When Saffron was sick, each visit cost me about $200 for exam, tests, and medications.
Since she passed, and my others have gone in for routine check ups and fecals the cost has come way down.
I think the check up visit is about $40 per glider. The fecals were about $25 per glider.
Still, with four gliders, if I take them in all at once it would be a lot of money. Instead I plan to take just one in every three months--that way each one gets seen once a year and I'm getting some feedback on their condition every few months. My vet said this sounded like a pretty good plan.
Since they all live together, eat the same food and whatnot, I figure if I check one of them every three months and something shows up, they'll all be in for follow-ups.
Maybe someone who has done this a lot longer than I have will have more insight in the matter.