I work 12 hour days normally and he is always blowing me up to "do this" or "read that" or "I'm going to start doing contract asphalt jobs!".

Too much red tape for me to deal with.

Are they predominately asphalt or concrete or are many crushed rock?

Since it sounds like you've started, duct-tape some tiles to the side of the window to help you visualize. 

Do you tape a piece of plastic in place of the broken pane or replace the pane.

Their refrigerator shelving is held together with tape, (that way when they moved in); they bought a stove so they could have more than one working burner, the downstairs bathroom has leaked so much the lino is coming up, the fence is held up with props and the gates are history. 

For example, in this price point, I am doing granite counters, stainless steel appliances, gutters, asphalt driveways (most cases), new cabinets, recessed lighting, new baths, new trim and doors, and the list goes on.

I have ordered double sided tape, strips for reversing direction, and cleaner (for satin finish).

Besides bringing in the sewer and utilities from the city, and laying asphalt, what other stuff goes into making a piece of land into a MHP?

Seal all asphalt, resurface all concrete, tuck-point masonry, patch & skim coat all stucko, bleach all siding, paint the trim and add fertilizer to make the grass greener.Establish a budget for your renewal project and keep going till you are out of budget.Good luck!