Quote from @Henry Clark:
@Bruce Lynn
Bring your own lawn chair. Let me know how many and when.
All the big costs are covered. The niece will manage and my uncle/ her grandfather is 20 minutes away. Add $12,000 per year.
Security. All covered in the security package. Will wake her up at night. Police station is 1 mile away.
Never seen a self storage with no managers office. So does this mean every time someone wants to rent, they have to wait 20 minutes for your uncle to drive up there and sign the rental contract on the hood of his Ford pickup(or whatever they drive in TX)?
That would also make it a prime target for thieves if they know there is no managers office. I know you said "everyone has a gun and the neighbor will watch it for 2 free units", but let me tell you, when you see 20 people per day moving things in and out of their storage units, it's pretty hard to tell who's a thief and who's a customer. In fact, when someone does steal something, its unlikely it will be known until the renter reports it (Unless the thief is really messy and doesn't close the door on his way out)
You also need to check how much storage units are in the area already and see if there is even a demand. When a market is oversaturated, you see them offer all kinds of deals like a unit that would normally rent for $100 would have an offer for like $30 per month for 3 or 6 months and then they hope you stay when the rates rise and not move to the next storage place offering a similar rate.