Please keep posting your questions.
NACA requires all utilities to be on for inspection and appraisal. Make sure that that will be done by the seller.
I do not know how cold is TN but here in Minnesota, most properties are winterized. Some seller will charge the buyer for de-winterized it.
NACA is a normal and rehab mortgage. It is required to do an inspection ( have to, it is not optional( and pay for it and a pest (termite) inspection too.
Do the inspection ASAP, do not waste any time.