@Kel
I’m not sure why the snark was needed, or what my previous business exp has to do with offering a suggestion on an anonymous forum.
Dealing with people, trying to collect rent, utilities, etc vs someone paying you to store their stuff, seems like a lot less headache. Apartments are probably still very profitable but I know several people that have had tenants do $20,000 in damages. If you own a ton and have an agency taking care of all the dirty work a la Grant Cardone would ideal.
Reading back on the OP it seems that the poster is trying to work a tourist niche so I suppose my original comment wasn’t exactly relevant, although with people owning more stuff than ever I think storage units are a niche that could still be profitable