I voted to accept the cat and get the dental done.
Pepper has a 6 heart murmur. When she got her tail chopped off last year, we explained to the emergency vet about her heart and told her that when Pepper had anesthesia in the past, she took a long time to wake up. The vet did a thorough exam of her own and changed the type of anesthesia for the surgery. Pepper did fine. Her heart did fine and she woke up very quickly afterwards.

Also, we adopted Pepper knowing about her bad heart. And we adopted Cammie at 10+ years old with bad teeth. There is always a chance that this baby will get a forever home.

It might be worth checking out iMOM's various funds for rescue organizations. 1 By 1 may be eligible for some funds.

From iMOM's website: Other qualification for rescuers only

Your rescue organization must be a 501(c)(3).

The pet must be currently in rescue or foster care.

Your rescue must have all pets spayed or neutered prior to adoption.

http://www.imom.org/fa/rescue/index.htm