Fun idea, but a bit boring to play IMO.
I didn't notice if rent/housekeep depends on tenant's age, and if it's not, it seems you always profit. I was simply taking the oldest tenant as soon as place got vacant and kept farming money.
Think some kind of "fast forward" button might've been useful, so you didn't have to wait too long to buy the next house. And QoL would've been if the "buy property" buttons themselves were showing whether you can buy the house or not, so you didn't have to click them to see how much it is.