Since 1976 I've lived in a 1973 14x65, Flamingo mobile home. They must have named it a Flamingo, because it was best suited for life in the tropics. The walls are 2x4 on 16" centers. I replaced the aluminum siding with building wrap, and Duratemp, T111, 4x8 sheets. The roof has been redone with a rubberized system, all windows converted to double pane. I paid $2400.00 for the mobile, and have spent about $12,000 in upgrades.
The home is comfy cozy, and receives loads of compliments. Best part of the whole thing, annual property tax is less than $30.00, a huge savings compared to homes in the area assessed at a minimum of over $2500.00 per year. With the money I save, I continue to make modes upgrades at my leisure, and the taxes always go down because it is a lowly house trailer. I'm laughing all the way to the bank.