It's not a vet I've ever heard of or anything, but it's fairly usual to end up with an "exotics" vet. The vets where I work would see just about anything - from cats and dogs to african crowned cranes to iguanas to macaws to rabbits to monkeys.
Lol well if it's a usual thing then I'm going to start self diagnosing a lot more!
Out of the 3 vets I've taken "exotic" animals to, only 1 saw everything under the sun and barely knew anything about any of them. The other 2 stuck to small mammals and actually knew what they were doing. I prefer my vet knowing more than I do when an issue arises. 
Unfortunately Dr.Sinclair no longer works there..I was told she went back to Michigan. Another great vet there is Dr. Olivia Petritz. And I agree with you, the front desk people are horrible, and the fees are outrageous. IMHO they are outstanding for emergencies but not as a primary vet.
I found some low cost spay Neuter info for you. The sacramento Spca Spays rabbits for $65 and Neuters for $35. If you are a resident of roseville or placer county there is a website: http://www.placerspca.org/snap.htmwhere you can get info for low cost spay/neuter vouchers. The bird and pet clinic participates with that voucher program. Also the pacific vetrinaryclinic in stockton does rabbit spay and neuters but they are a little on the pricey side. They charge $125 for spays, and $100 for neuters...but a bad thing is that they don't give you any pain meds for the rabbit because he is not a rabbit vet and he beieves a rabbit will heal on its own.
