Just do what I do, Take a house & make it ur own. or take over some other buildings that scum lives in. I'm not 100% sure but I think most buildings that have their own cell (loading door, not open building) have chests that do not respawn, you would have to test this with crappy objects you don't care about, leave them in a chest in a building you might wanna take over. See if they are there in a few days/weeks.
I thought closed cells were 30 day respawns. I might try it and just RP in that I fell into a coma or something.
Edit: The UESP says that the end table in the alchemist's cabin
doesn't respawn so you could use it to store stuff in as a player home.