[RWebb]

in my town, it is cheaper to remodel what you have -- anything at all -- than to start from scratch b/c of permits fees & systems development charges

you need to find that out for your county, state & township (if you have those) -- you are not inside any town's limits (or urban growth boundary, etc.) are you?

the cheapest & most, ah rural charm way to go, would be to sand blast all the rafters and superstructure; get a good sprayer and hose everything down with stain; put in hydronic heat hoses & any underfloor utility runs; then lay a concrete pad (maybe with coloring agent??) and add whatever from there

you'll sanitize any nasties from the barn use & it will look nice & rustic