Time to put in my own 2 cents.
If you are going to breed, you do need to establish a market. Whatever it may be. The first two years I raised rabbits I didn't sell a single one, I had to give them all away. And I'm sure some of these went for meat, and I know some of them are living happily in pet homes. I made the worst mistake- I made assumptions that I would be able to sell them and I ended up with several different breeds. All but two of these had to be given away. It taught me a lesson, though. All I'm trying to say is it's going to be a learning experience, whatever you decide to do. Mini rex are difficult to breed because, if I remember correctly, they are a dwarf breed. Mini Rex are difficult to show because, if I remember correctly, they are the most popular breed in the country at the moment. You won't be winning with a breed like this during your first few years. It's definitely a breed that takes a lot of time, devotion, and an in depth understanding of the breed standard.
You keep saying that you want to breed, but it's almost as if you expect it to be fun and games. It's not. Rabbits are hard work, and they are absolutely devastating at times. Your reward for putting up with diseases, sudden deaths, DOA kits... trophies, awards, if you stick it out long enough.Rabbits are not prolific, in general. Most are not mega producers, and sometimes, there you are with a baby you are really excited about... only to come out in the morning to find it dead in it's cage. Rabbits are not easy to sell. You shouldn't start with the idea to make a profit. Profit comes RARELY and even then, late in your breeding program. I recommend you know how to put a rabbit down on your own. It is not a terribly hard thing to do, and I know this is going to be uproarious, but it'll save you a good $70 when push comes to shove. I watched a rabbit waste away in her cage for weeks before I got the guts. It isn't fair to them to make them suffer, and it's most cost effective than getting them euthanised.
That's all I can think of for now. Basically, be serious, and know what you are doing.