roof on, framing done, pool started, rough plumbing done, electrical rough will start next Thursday, A/C install next Tuesday. 

Electrical and plumbing all updated within the last 4 years.

I don't remember their names but people from the War College helped us redo the electrical and plumbing for cost which was amazing.

Maybe the owner of a plumbing business. 

I was able to convince my lender to allow me to do an air pressure test of plumbing lines, it passed and so I provided that info to the lender and they accepted it in lieu of turning on water.

Could you have the house rewired and plumbed by the world's slowest plumber and electrician?

I assume it has sewer/septic, water and electric and they 2 tiny homes are plumbed/wired?

For example, if I want to install new plumbing in the bathroom because the old one is old and broken, would I need a permit to do these fixes? 

It's a former adult care home, so the layout is shared bathrooms, and this would allow me to not have to change the plumbing layout while offering a competitive price-point and unique experience to travelers.

I plan on taking some introductory classes for plumbing + electrical + carpentry + ???