I read the whole Stokes' catalog and picked out a couple dozen candidates, but most of the plants they carry are too large for me to use a lot of. It gave me a lot of ideas, though - my list is getting pretty long already. I don't know if I want to bother with trades, but I'm pretty sure I can find better prices than what Stokes has to offer so I'll be shopping around.
I've got limited space and the planting also needs to be relatively maintenance-free, as it may be left alone for up to two months at a time. There will be an automatic watering system but I have to assume that it might go a long time without pruning or weeding. The location is tropical more than subtropical; not much seasonal variation at all.
Buddha's Hand is an exciting idea - hopefully it doesn't need a cool period like some other types of Citrus. Aristolochia would be cool but I'm concerned about scrambling vines; Passiflora may be out for the same reason. I'm already wondering if Nepenthes might be too quick-growing.