Sorry to say this but you can't possibly "love your parrot soooooo much" if you're considering abandoning him to his fate, which will surely be death, after one bite which, by the way, was YOUR FAULT, not Rio's!
You need to spend time, LOTS of time, reading up on how to provide the best care for an animal of Rio's calibre. You've asked many questions here but it doesn't sound like you've done any research of your own. Forums can help A LOT, that's for sure, but self study is very important too. However, one needs a certain level of commitment to spend the time required to learn all that one can...
I'm afriad I'm with Wendy and I have grave reservations about your commitment to giving Rio the home and care he needs and deserves. Let's tally up what we know so far, shall we?
+ you've had this bird for only a month
+ you've raised several health concerns (skin on beak, feather plucking, missing toe) but you have yet to have him seen by an avian vet
+ you have, by your own admission, forced him to step up but he surprisingly learned to step up freely one day after I told you never to force him
+ you have him in a tiny cage and whilst in one post you said you've tried bigger cages, you say in another post that you will go buy one... Why buy one if you already have a bigger cage?
+ after having Rio only a month, you're looking to add another bird to your flock. Why? One should first learn everything possible about the bird one has, and allow that bird to settle and bond with one, before adding a new bird in my opinion.
All of these things indicate that you're not ready or willing to make the sacrifices needed to be a parront yet. You're looking for an easy/fun pet and an amazon CAN be that but certainly not overnight.
I apologise if my post seems harsh or unfair, I do mean it well. As a zon parront myself, the species is near to my heart and I don't want to see any zon not receive the very best care its owner can provide.
Good luck.
