easy is a relative term, it is easy if you know how it's done and have the proper tools.
I would suggest getting some quotes from local contractors that specialize in placing concrete slabs. I think you may find the quotes will be less for a plain slab than your paver patio. Of course that is a "guess" because I'm in Massachusetts and not NC so I have no idea of local pricing in your area.
"You get what you pay for, and sometimes free costs more!"