Step on is decontaminating the site, probably busting out the concrete floors and if necessary the soil under it.

-Offer to visit job sites and help design with the investor/owner.

., which has multiple offices and staff that can handle 24/7 management of all site properties.

Advice NeededTLDR - Spend an additional $30k now to upgrade the sewer system on-site while the contractor is already mobilized or go with a sewer injection pump which is likely a viable solution the will last for years with proper maintenance. 

You'll find more people on regular long-term rental sites than you would on anything designed for MTR, which is not even a term people are familiar with.If you are renting longer than 30 days, you should screen, collect a security deposit, use a written lease agreement, and follow the landlord-tenant laws for long-term rentals.

Check with a lawyer firstfor showings to a buyer, book a day on the arbitrage site.....

This means waiting for the inspector on the job site.

I agree with the previous advice regarding hiring on-site management.

You're going to be living in a job site for a year or two, and by the time you've built the house you love, you'll sell it.

Though I suppose many people would rather have new construction townhouses or a 3 or 4 story apartment project on the site.