Since the garage is the only available room and there’s no problem with your parents for having the kitten in there, can you just stick to it and move on from there? Meaning do all the necessary like feeding, playing, visiting, getting him used to you and work your way up in socializing with you?
Make him comfortable there and give him all the love and assurance you can. It’s a slow process but you have to do it otherwise it’ll be more difficult as he grows older.
Let the garage be his room and since you have two other cats and you don’t want them to feel put out and stress from it all. This is the solution now unless there’s someone who is ready to adopt him and don’t mind going through the socializing part with him.
As you know, all these takes time. Easier with a kitten than an adult but with an adult it is still possible. There are many success stories but it’s just the amount of effort put in to make it work.
Make him comfortable there and give him all the love and assurance you can. It’s a slow process but you have to do it otherwise it’ll be more difficult as he grows older.
Let the garage be his room and since you have two other cats and you don’t want them to feel put out and stress from it all. This is the solution now unless there’s someone who is ready to adopt him and don’t mind going through the socializing part with him.
As you know, all these takes time. Easier with a kitten than an adult but with an adult it is still possible. There are many success stories but it’s just the amount of effort put in to make it work.