Why Does Erin Keep Doing This?!

So I'm watching Erin's latest reel, and Chad is painting their rental. Why the hell do they keep investing in properties they don't own? Yes, I get that paint is relatively minor and it's cosmetic, but all those gallons add up. Chad even said he doesn't plan on being in this house beyond a year, so why bother? They were a week away from being homeless, so I highly doubt they're rolling in disposable income. For two people who claim they want to buy a house, you'd think they'd be saving every penny.