No problem, on further thought it makes perfect sense that type of thing will vary from shelter to shelter but I very much appreciate the replies. I'll do some research on the shelters in the area and make some calls.
The rehoming is such a difficult consideration on multiple levels, not only because of the obvious reasons but also because it's really not just money. During the bad times it's a lot of emotional and physical energy and overall effort and can be extremely disruptive and just... well, difficult. Money doesn't magically make it go away, just makes certain things a little easier, not that I think you were suggesting anything to the contrary. We don't yet feel like we've really had to make any decision about his treatment dictated by finances, and that's exactly what we're hoping to avoid. All dogs are unique, of course, and Sebastian is "particularly unique" at that. He's a bit 'quirky,' as we say, and he has problems with unfamiliar people from puppyhood that, try as we might, we were never able to fully socialize out. He is as attached to us as we are to him and while he doesn't really have separation anxiety, he seems especially relieved beyond just happy whenever we come back from being out or when we pick him up from the hospital. He just kind of has a seemingly intensified herding dog personality and then some things that are all his own.
We both work at home and are able to do those occasional 24-to-48-hour hauls with him, whatever that ultimately entails. Besides the obvious stress of going to the vet, possibly overnight, his particular personality makes it it's a constant question after a cluster and after he's already had a ton of meds whether he's better off at the hospital or relaxing at home if the cluster may have stopped. There have been a number of times that by the time we get to the hospital, they do nothing but observe him and it can still cost a lot. He has a neuro specialist who can and does advise us over the phone if he's clustering and they have an attached ER... when we travel with him sometimes to visit my parents he has a 24 hour vet there too.
I know you weren't necessarily suggesting a rehome is needed at this point and were just pointing out that's what some shelters will end up saying. I hope I'm not coming off as too defensive, I guess I'm just relaying that it's certainly something we've talked about and that's pretty much the conversation we had. The conclusion we came to is that we honestly feel like with the barest of assistance, there's little more anyone else could feasibly be doing for him right now. Of course, we want what is best for him. We just also do a lot and are trying to be proactive versus already drowning or jeopardizing his health, so we believe the best thing for him is to try to figure out how to avoid needing to rehome. I would think that is almost always the case with a dog in a happy home, anyway... that if you can avoid needing to rehome, you should. Maybe I'm wrong, but we're certainly not ready for that yet in either case.
Anyway, the Wally Foundation did send me some material and might be able to help some with his prescriptions so we will see what comes of that, and I'll call some shelters in the area and ask what programs any of them might have. My mom has mentioned that one of her friends may save money by getting Keppra either straight from the manufacturer or else through some site or program, a little unclear. At least we have a few leads now and feel like we have a plan.
Thank you both again, I will keep the thread updated.