My thought was to clear the back acre, cover it with gravel (or millings)  and offer machine/equipment storage until the proper time to build the expansion.  

You'll have to pay tax on the remaining FFE (furniture fixtures and equipment) and good will.

REPS hours.4) Getting ready to rent the property pre-close but post-contract:  Understanding HOA rules and incorporating them into proforma lease agreements; preparing and posting rental advertisements; shopping for, selecting, and purchasing furnishings to equip the house to be put on the rental market.  

I do not know much about you but sounds like your advantage is your construction knowledge and the equipment or relationships you have with that.

Equipment, furniture, and fixtures, termed "§ 1245 property", are tangible personal property.

That said, if it's common in your area, then figure out what everyone else is doing, especially the big guys in the industry, and copy their contracts and equipment.  

. § 227 SEC. 227. [47 U.S.C. 227] RESTRICTIONS ON THE USE OF TELEPHONE EQUIPMENT(A) to make any call (other than a call made for emergency purposes or made with the prior express consent of the called party) using any automatic telephone dialing system or an artificial or prerecorded voice—

What others do does not itself equip you with the recipe for success!

Depending on the size of the property, you could add vending, laundry, and other services.

By the way the equipment (furnace, coil, condenser) will cost YOU somewhere around $1800 - $2400 depending on the house size.It will cost one of these shops far less than that, but of course, they will when asked say it's $3000 + worth of equipment.