Definitely see if this is something you want to do. Often I end up having to give up an entire day or two to take a mother chin to the vet...and then there are the nights I have to get up every hour to handfeed or check on everyone. The possibilities of what can go wrong with chins that aren't in breeding are immense, but with a female in breeding the possibilities and likelihood of having a problem are so much worse.
Let's say that the expense means nothing, the amount of time required to take care of a mother chin in crisis is crazy. It's not like they are going to have problems at a good time where you can just take your girls to the vet at 10 am and everything is fine. Mother chins have problems in the middle of the night and early morning...and weekends and holidays seem to be very popular times for emergency c-sections and spayings. Sometimes I get a day or two behind on my work because I have to completely give up my time to attend to an emergency. Here's the thing, this is what I do...this IS my job and I have a hard time keeping up sometimes because of problems. I always wonder what someone with a full time job would do about this. Back when I was in college it was a real problem and it cost me a lot of sleep.
If someone is willing to take on the immense sacrifice of breeding chins when something goes wrong, that's fine. In my experience it takes special people to want to breed and do it the right way. I always think about the calls I get at midnight with someone trying to get out of going to the vet when their females are having problems. (The last one was someone completely unwilling to go to the vet and the female died, of course.) Please, anyone reading any of this, take it seriously with breeding chins.