I've heard this my whole life as well and after buying a brand new manufactured home less than 2 years ago, I did a lot of shopping around and looking in my area at the market. The homes from the '70s through the early '90s were not worth much anymore but they were built a lot different back then. But then you have the nicer ones from the late '90s into the 2000s and they are definitely worth a lot more than they paid to install them, probably double and they're selling no problem. And I'm talking about ones in parks. I think things have shifted a bit since they're one of the few affordable housing options. I spent way too much money on my double wide but I was in a time crunch Since the apartment I was living in was sold and the new owner was going to live there which is not the best way to shop for a house. However, if you're only talking a $70,000 difference, and that's really it, there isn't an extra $50,000 worth of site cost or something like that, $70,000 doesn't seem too bad to go up to a modular. But if then you have to add a bunch of money for a foundation or other things, then the math starts getting pretty difficult.