Breeder recommended ??

I don't have a bird at the moment but I am looking to get a GCC (Green Cheek Conure) by next year. The breeder I've talked to feeds their birds a seed diet with a some powder supplements and some soak mixture, with the encouragement to give the bird extra fruit and veg for variety; this is also how they'd recommend feeding to buyers (that'll be me eventually).

Now personally I am ok with this, the seed mix they use and talk about has a good variety of mixed seed with a low percentage of sunflower seed. I am in the uk and pellets seem to be few and far between even online (on uk websites i mean), so far that I've never seen pellets in pet stores here, and when i see them online they seem to be silly expensive when compared to the seed-vitamin-soak option (pellet or seed, I'd throw in fruit and veg).

I do not think what the breeder does is wrong, I know they are advised by a bird specialist that helps them with everything from dietry help to buyer questions that they want a second opinion on (they referenced him with a few questions I`ve asked, including when I asked about pellets vs seed; this was before i realised how hard and expensive it is to get pellets where I live).
I type all this because I am aware that the main thinking is a base diet of pellets, but this seems incredible impractical/hard to manage for me where I live.
My question really is, with my situation does this type of diet seem good for a Green Cheek Conure (who we'll have flighted):
Low sunflower parrot seed mixture WITH vitamin supplement powder (as base)
soak/sprouting for half a week
fruit likely kept for treats
veg to make up on days without soak

Water is not a question, it will always be there.

Does this sound like a good solution?
Note: I am aware of dangerous foods, and we'll do our best to resist begging if birdy-boo wants our human food (future bird has no name yet).

A conure doesn't need pellets to be healthy, but seeds shouldn't make up a bulk of the diet. Sprouts and vegetables should be the base of the diet, with a small amount of fruit offered daily and seeds as a treat.

My conures eat daily: The bean / veg mix that JerseyWendy details in this thread for their breakfast, as I find I am generally too busy in the mornings to do much with their food.

In the afternoons they get sprouts, chopped fresh vegetables and fruits. My staples are things like:
Kale
Cooked Squash / Pumpkin
Peppers of any variety
Carrots
Cilantro
Parsley

At night when I put them to bed, they get a small amount of seed.

The powdered supplements are because the seed diet that the birds are being fed is lacking in a number of vitamins, minerals that a bird should have in their diet.....in their natural habitat, green cheek conures eat more leaves, flowers and fruits than seeds and probably few if any of the seeds in the majority of commercial bird seed mixes.....

A number of years ago, when it was determined that a diet of pellets would offer companion birds a general diet better than an all seed diet, the books & other published information began promoting pellets as the recommended food for pet birds.....the problem was that like clothes, one size doesn't fit all.....then more research was done and current thinking is that an assortment of fresh fruits an vegetables provides a better diet for our feathered friends than do processed foods (pellets).....since you are doing your advance research, you might want to read up on fresh foods/chop for conures and if you change specie choice, read up on the diet normally eaten by that specie also, some birds require more or less of different vitamins and/or minerals, like I mentioned one size doesn't fit all.....while I'm sure the breeder you've talked to raises their birds right, I would become more familiar with better diets than just a seed based one.....

If you were to read up on and become interested in sprouting, that would be a very good nutrient base to start from.....there are a lot of members here who can give you more information on sprouting.....

Good luck.....

Wow, that link was pretty awesome.
OK a rethink:
Frozen mix veg (we always have it)
Wholemeal pasta
brown rice
Sweet potato
Squash
Beans (the hardest part to keep easy as I am not sure how easy it is to get a good variety of bean without setting aside a cupboard just fornbags of beans. But I'll find out).Proportions in order or above:
4:2:1:2:2:3

hopefully that makes sense. Veg is the biggest part, then beans, then rice and pasta combined (though more pasta), then equal-ish sweet potato and squash (leaning on sweet potato).

This seem ok?

Given that you're only feeding only little bird, I would definitely halve or even quarter the recipe. Then after you cook it, portion it into meal sizes in baggies and freeze them.

I wouldn't freak yourself out about the proportions. Veggies = good. Orange things = good (beta carotene). Bit of lean protein = good.

Sprouts themselves provide almost everything a little conure needs. If she eats sprouts, gets some veggies, has a little protein now and again.. she'll be a healthy, happy bird.

That mix I linked isn't something you HAVE to make, just what I personally do.

True, I'll keep this all in mind though. After some digging I finally found a food pyramid for canopy birds, unspecific.

HolisticBird and HolisticBirds

It's a little complicated at times but the it's good for me (studied some nutrition and dietary science for humans a while ago). I'll look for more material to go by but I think I'll eventually do a combination of what you do Selestine (and that link) and use either that food pyramid/whatever else I find.
Thank you all for the help though likely for the first month or so our future bird with stay on the diet they were on before with the breeder but I'll definitely try to move the bird onto something like this.