Newer mobile homes aren't too bad. I lived in one for over 7 years. I still prefer a good stick built house.
Our mobile home had brick underpinning, a concrete front porch with roof, screened in back deck with roof and we had scissor trusses built to put a whole new roof structure over the house. Looking from the outside, you can't tell its a mobile home.
There are some other funny things about them, depending on where you live. In SC, they are registered and taxed as vehicles like a camper. Insurance was cheaper. That also kept the property value and taxes lower for the land itself, since it didn't have a "house" on it.