The test run with the hospital was a success! However, it was a bit boring as a residential lot; I'm tellin' you, even my sims were bored. *lol* I'll rezone it tonight and test it further. If it's too much of a drain as a community lot, at least I know it's playable as a residential.
[ETA] I spoke too soon. I rezoned it, and now it's crashing just as badly as the original.