These houses don't use sheetrock it's styrofoam insulation sandwiched with two aluminum panels.

I live in Oklahoma and have been investing in Southeastern Oklahoma for 20+ years as a buy and hold investor. 

Instead, they miss the cloth or aluminum wiring and poor circuit allocation and instead show you with their fancy plug that "polarity is reversed"; or the always arbitrary "the roof likely only has 5 more years left max" because they see a 3-tab shingle from the ground and completely miss hail/wind damage on a newer architectural shingle citing its "lifetime warranty".

A bent aluminum gutter shouldn't cost more than $100-$200 to replace and it isn't justification to break the law.

I concur with @John Thedford. depends on the market.Rentometer is pretty much universally useless for properties in Canada and there are markets in which we are involved or pursing properties in the U.S.A. where it's off the mark (South Eastern NH is one).

You would think Trane is the higher end, but, I remember they used to have aluminum radiator tubes and they rust and cause leaks in the ocean air environment of Tampa Bay.

It turned out there were aluminum wires so we upgraded the electrical service, removed all of the walls so we could rewire the house (4 bed 2 bath).

A friend of mine wants to buy some land behind his house in southeastern MA.

https://www.amazon.com/Funny-Decor-Office-Business-Aluminum/...Like this?

Most likely looking to invest in the beach/coastal communities in the Southeastern US and possibly also the mountain areas in Georgia, Tennessee and North Carolina.