If a coach cannot work the catchers into the hitting drills I think you should look for a new coach.
I strung a 10x10 net in my garage for winter work at home. It worked very well for soft toss, T drills and some throwing drills. There is a lot that can be done at home if you have the space in a yard (pop up net/T work) or a garage. Team drills are great but it is hard to get enough work in. Everything is a compromise unless funds are unlimited.