I would suggest searching in areas that allow mobile homes because that is my most common inquiry.

The boys anyway just need a few tiny or mobile homes with a couple shops they can work on their cars, trucks and motorbikes. 

Alternatively, you could also just apply a % annual appreciation based on historic data, but those typically won't give you the most accurate market data since they're averaged out across all/most property classes (e.g. a single family home may appreciate differently in your area than a mobile or multifam property, etc.) 

Which reminds me....I know Worcester is smaller but if you're adding legal living space they may want a survey of the lot, architectural plans for the added space, don't forget about permit fees and other things that will hit your wallet. 

I have 3 mobiles, that I need rehabbed

Lo Cancels: Jennifer Lopez canceled her summer tour, including a stop at T-Mobile in July, citing a desire to spend more time with her family.

Maybe look for a campground or mobile home park that has some of that infrastructure in place where it will be relatively cheap to add the geodomes?

Not for the faint of heart or the shallow of wallet. 

Should I buy around the Huntsville area, near Birmingham or Montgomery, or Mobile?

Understood Facts: As demand for affordable housing grows, mobile homes present an attractive entry point due to lower initial investment and high potential returns.