-tax deductions. Are your spendings on new snakes, something that you can deduct as a writeoff? How about equipment?
Up to a certain amount a year I think its like 6000.00 a year but check with a CPA on that

-is it worth it for a small-time hobbyist who only breeds 3-4 females, to do this?
Will you get stinking rich NOPE.. could you maybe save a buy a boat or Christmas presents or something with the money you make..Sure.

-my hubby has a DBA in NY state for a construction biz. Is this useable for snakey business? (under his name) but we Are married..
Thanks!
No this is not a smart idea. first if you are going to run this like a business get you own bank accounts and keep track of all expenses/overhead/income remember this is a business now.

Second this also allows people to write checks to your DBA instead of you it helps keep the money separate in you mind.