Sorry for the late reply,
The injections are sometimes one injection of both(new to vets, mine dose it for £45 per rabbit)
Single injections I think where about 30-35 each, with a 2 week gap in between.
I know sometimes people don't do it, but or 50ish a year per rabbit, it's worth it unless you are over run with them
Mine will have theirs once my girl is spayed, I want them nice and settled before having them, and I will do the 2 in 1 injection.
I don't know if they charge a consultation fee, as it should come in as a routine job not a 'find what's wrong' job.
Hope this helps x