We have had this done with three rabbits in the past (we adopt difficult to home buns so have a higher than average rate of this sort of thing).
In al cases the buns were SO much better off without the bothersome teeth - in each case of course after assessment by a vet that the op. would be the best thing.
In a small nethie (Thistle) it cured her sniffles and eye issues almost instantly- as the teeth had been dragging her health down, oter are also much better for it.
Cost? no idea - get the best vet you can is my recommendation - regardless of cost. Its is important all the tooth is out otherwise it will simply regrow.