This may not be a fair statement, just what my experience has been, as well as many other close friends who are also breeders have experienced, but " It seems the breeders making a profit, are ones who are not doing certain health screenings, not showing, and are more likely to send a kitten out between 6-8 weeks old to save money.
I have been a breeder for only a few years now, I did a lot of research, for many years before I began breeding.
My opinion is to start out small. You mentioned breeding Bengals, I don't know if they have any specific health issues, but that would be something to check into.
Such as my cats, I screen them for HCM yearly to bi-yearly, the cost per cat depends on who does the screening.
Then, you have to think about emergencies that can and will come up, you may have paid for stud service to get your female pregnant, and it turns out that she ends up needing a c-section and loses all the babies, or the Momma needs to be spayed, you are then in the negative.
There is so much that could be put into a post like this, I could go on and on with different scenarios, that can come up, and most likely will at least once, if you breed for any length of time.
Find a breeder who has experience with the breed you hope to breed, and explain to them that you are taking your time to learn and you would like mentoring. I wouldn't know half the things I do, without my 2 mentors who have lots of experience. Even though, I feel I am fairly knowledgable, I know that I can breed for many years to come and will still be learning something new.
I have a room for my stud, we did do some remodeling to make it more cat friendly, but we are lucky he doesn't spray, that is very rare. He can come into the rest of our house and does daily, we just make sure he can't get to any girls, to make an oops pregnancy. I let my girls have the complete run of our home. We did have an instance of 2 of our girls beginning to spray during heat cycles, but Feliway helped us to stop that behavior.
Finding a vet that you feel comfortable with and that is also breeder friendly is important. I have a very close relationship with our vet, and there is complete trust between us. If we are having trouble with something, we can go and get other opinions from other vets, and then decide where to go from there.
Cost of your breeding cats, showing, regular vet visits, emergency vet visits, yearly health tests and screening, feeding premium foods, litter, vaccinations, wormings, hopefully spaying and neutering the kittens before they go home, spending money on a website, or other advertising, yearly fees for joining breed clubs, breeding materials to aid in delivery, a safe room for just your kittens to stay safely and comfortably confined until vaccinated. If you plan on a separate building for your cats, then that is several thousands.
If for some reason something came up with one or more of the kittens down the road and it turns out to be genetic, you should have to either replace kitten or refund money, and if it happened to be your frequently used stud, money set aside will be needed to reimburse possibly many families.
I am a stay at home Mom, and I really can't imagine breeding if I worked full time, but that being said, many breeders can manage doing both wonderfully. There will be times that you may need to supplement one or more kittens, and taking off of work may be needed if you can't find someone to help out.
Okay, I am sure I am rambling now.
I just recently had a person contact me for a cat and asked for me not to spay it as he wanted to have a couple of litters, and when I asked just a few questions, he was shocked with how much is involved, and wasn't prepared. So, I try and give a more realistic view of breeding. I really enjoy it, it is my hobby. I fell in love with the breed, and thought I could benefit the breed. I am fortunate in my husband has a good job and can support my hobby.
My husband is just as involved with every aspect of breeding, without him, it would be a LOT of work.
It is a lot of restless nights when a Momma is expecting, as I want to be there for every delivery, but I can say it is worth it to me. My favorite part, even more than watching the kittens grow for the first few months, is hearing from our families even a few years down the road, and getting pictures of this big, beaufiful adult, and they are still so happy with their furry family member.
Okay, please don't kick me off for such a long post.
I hope I helped a little.