I would agree with contacting Quillane Welsh as they might be able to help with getting you in contact with some smaller breeders (of course most of us who breed welsh cobs do it on a very small scale) who are in need of someone who can start/back their youngstock. You might also try to get into contact with a very successful breeder of eventers, mostly of welsh cob x tb breeding, Carol McDonald as to getting some insight on what crosses and does well. I will ditto what Daventry said in that purebred welsh cobs are certainly an acquired taste in both the eventing and dressage worlds. I find many people in general and this goes for the eventers and dressage folks around here are a bit more accepting of the <nice, meaning they are well balanced and move well> welsh cob x TB crosses.
I fund my breeding endeavors via my “day” job. I had a lot of experience foaling out horses before I even got into vet school and having my degree and experience does not hurt. Being a veterinarian certainly decreases my expenses to a point; but, you will still find that breeding horses, particularly a relatively unknown breed, is not for the faint of heart. Unexpected tragedy happens even when you do all the right things and can take it’s toll financially and emotionally. There is also, at least I find, quite a bit of difference in owning and campaigning a stallion in addition to or as opposed to just handling the broodmare side of the equation so a business plan is a must if you want to survive regardless of how you choose to help fund it. I am also lucky in that I start/back/train/show my welsh cobs all by my lonesome with just the help of my kids (free labor) but that will be ending soon as my daughter is leaving for a working student position for the next year in just a few days. Fortunately I have always planned and built my facility with the “doing it on my own” and extreme efficiency in mind. All of this I did by choice because I wanted it to remain my hobby (though nice when it can produce some revenue to help cover the costs) and never become something I regretted or found myself resigned to do. I still get up every day looking forward to the time I can steal from my “real” job to spend with my cobs. Good luck with your future endeavors.