I dunno about pricing back then but the issue is the amount of wealth that can be generated from a situation like that.
Like, hypothetically, let’s split your grandfather into two people. A landlord, and a maintenance guy hired to maintain those properties, getting paid a fair wage.
Would the landlord make money, after paying a mortgage and his maintenance man?
If the answer is no, then becoming a landlord isn’t financially beneficial, and your grandfather could’ve just been a handyman, and made a steadier income, his money not directly dependent on whether or not someone paid rent.
If the answer is yes, then your grandfather made more money than his labor was worth. While he earned money doing labor, the real issue is the money he earned by doing nothing. It’s likely your grandfather made quite a bit more money than his labor was worth, given the fact that property management companies live entirely off of the price difference from labor put into housing and the price they can charge.
Landlords are middlemen. They’re used car salesman for houses. Are there landlords that aren’t shitty? Yeah. My last landlord was awesome, he actually sold me the house I was renting, when I told him I was gonna buy a house and start my family. He was nice, reasonable, all those things. The total rent at the time (pre-covid, so a lot better than now, and split among 6 people) was 2250$, and my mortgage worked out to be 900$.
Did your grandfather put effort in? Yes. Did he make money doing nothing? Also yes, the difference between what his labor was worth and what he got paid.
That margin didn’t come from his labor or his smart investments, it came from other people trying to live, and potentially created hardships. If his tenants could’ve paid for the actual cost of housing instead of whatever your grandfather charged, that might mean another kid got to go to college, a father getting to retire earlier, a family that could’ve worked 1 job instead of 2.
Your grandfather is probably fine, he likely understood hardships and acted like a human being, but he still belonged to a class of people that are better off if they find ways to minimize the amount of money other people have. Some people judge others for taking what they don’t need.
Just wanna throw in a voice saying your setup sounds completely fine to me. Maybe it’s a bit odd but it also sounds like how I’d do it if I had storage needs that large.
My current storage needs are currently met with a 2.5" SSD connected to a raspberry pi shared with samba over WiFi though so I’m pretty sure every storage nerd in here is gonna tell me my opinion doesn’t count, take it with a grain of salt.