How to make placeable weapons and other consumables respawn.

[TheInnkeeper]

I'm trying to figure out how to place an item or weapon in a building so that someone can grab the item by either interacting with it or by walking over it that will respawn after it's been taken. There are some limitations that are preventing me from just doing this in Hammer. The best I've come up with so far is using permaprops and gmod_admin_cleanup but that is obviously not the ideal set up.

Ideally I'd like to be able to sell weapon spawns for players homes so whenever they die they can re-equip themselves.