I find it hard to believe it would work well and be easy-ish on supply piping though.

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But this money is more risky to the bank (so a higher rate is normal), and they have a limited supply...so they need it back sooner (so shorter terms). 

In general, you look at the MSA population growth, job market growth, major employers, major industries present, whether the infrastructure exists in the area, is supply lower or higher than the demand. 

-Try asking for references at mobile home parks in your market- People that live in the park and are working on their home-Mobile home supply storesHope this helps you out!

But this money is more risky to the bank (so a higher rate is normal), and they have a limited supply...so they need it back sooner (so shorter terms).

Do you have a limit that you set when buying supplies?

I assume this also means you’re going to go to the various supply stores, shop for everything and get it to the job site?

@Chester Straley Then research the supply and demand for the area and see how much income you can generate.

Go to your local electrical supply house, where the pros go to get their supplies and tools.