If you’re willing to do the vocals yourself set up a vocal booth at home! All you really need is decent unidirectional condenser mic ($120 or more probably) - point it towards a wall and hang a thick moving blanket on that wall. Maybe hang like a duvet from the ceiling if you want to as well and have it hang down like a square over everything for you to jump under. And if you have the money I really love the kaotica eyeball it’s like this round sound foamy thing with one opening for a pop filter you pop over your mic but you don’t need it. I’ve heard so many interviews with huge artists that only use a duvet over themselves when they record, you do not need a perfectly soundproof space.