Maybe have a system (if you are adding trading and stuff which i heard you are doing) so that when people join your condo you can have a npc wherever you wanna place it with all the things you have up to trade and when they try to trade you can see like a notification saying they want to trade this from your shop would be pretty cool to run your own business through a condo saw this in gmod tower where this dude made a hula doll shop from his condo when trading was a thing
only example picture that i kinda saw simulate this was this picture (except it would be example “your shop” and your tradeable things) dont know if this would work but just an idea
https://vignette2.wikia.nocookie.net/shamdarkrp/images/3/31/Shop.png/revision/latest?cb=20140626211454