The key factor is ensuring you have proper documentation to support all the transactions, deductions, and income reported.

In the old days, grandpa would buy the shingles and spend his week of vacation from the factory replacing the roof when it was needed.

Which is fine, it's just a matter of figuring out what that risk factor is. 

Statistically speaking, it is very unlikely that you would do this.Another MAJOR factor is that you should review your note for each loan you have closely. 

Where small sections are built in a factory and then assembled on-site. 

I'm exploring different options for building on vacant land here in CA and am very intrigued by pre-fab home designs (Walls etc.. are assembled in a factory and shipped to site).

Thats just one factor. I

The most important factor is consistency, as jumping from one strategy to another over a short period is ineffective.

A South Korean company that supplies Tesla is inching closer to a transformative project - codenamed "Project Motion Forward" south of Austin that could make the company Buda's largest private-sector employer.Futronic's potential project is part of the continued "Tesla effect," referring to how electric vehicle suppliers have flocked to the region in response to Tesla's mammoth presence in eastern Travis County where the Elon Musk-led company has a huge factory and headquarters.

Reminds me of the scene from the big short with the stripper who has five properties and swimming in debt.The other factor is how much do you have in reserves, do they cash flow and could you afford a job loss?