Clean Up (includes the insides and the outside of a building) Air out the building Removal of contaminated materials: Carpets, carpet pads, Linoleum, drapes and blinds, air-filters, refrigerators, range, water heater, all tenant clothing and their furniture.

I would be buying a 4 acre commercial piece for ~$100 in the southwest part of Oregon, extending the city services a few hundred fee up the state hwy at a cost of about $70K and starting with ~20 or so full hookup, gravel-finished pads with room for up to ~50 sites down the road.

My initial plan:-considering 2 coats of poly-lease verbiage on protecting the floors-giving tenants a set of felt pads at move inAnything else I should consider?

If you could increase average rent by $50/pad and lower expenses by $25/pad, that will add $1,275 to Net Operating Income (NOI).

He hired out electric and had a pad poured.   

Possibly pouring a pad and just building a canopy of sorts so it was at least covered.  

At the time I wasn't a great negotiator so I took a brake to really crack down on it.

Get thick carpet / pad once it is time to replace it.

We are considering letting the tenants brake their lease and move.

If he is very enthusiastic on this, and the money is technically what he has earned/saved, then it may be very difficult for you to put the brakes on this.