This is interesting, in the sense that the question is two-fold; (1) how much disclosure is needed; and (2) are there any special protections for short vs long terms?.

Arguably a sub-letted property needs to be habitable (landlord to let), so this should be ~covered. And with "yelp" style reviews hopefully discloure is possible (ie, are the linens Ok or is there mold etc). But there are some things that have health considerations...cross-contamination, rodents, etc. And who is responsible? Is this OK at "caveat emptor"?

These are interesting fundamental questions about how much its possible for private contracts to work with/out Gov't regulation. Its exciting to think about ways to solve these problems (ie, not just gloss them over) with technology rather than with politics/bureaucrats, etc. That is: if it is possible, or not.