PPL does sell a bunch of pre owned coaches. To me, this means their pricing might be a value to the buyer. As to the 7K towing, I don't think you'll find a gas coach that can tow that much weight. Most are rated at 5K maximum. Both the hitch and the coach rating should be checked, before you fall in love with any coach.
Consider a diesel powered coach. Make sure the coach and the hitch are rated for 10K lbs. (GCWR-GVWR). Above all and most important, make sure the wife loves the floor plan.
2005 Newmar KSDP 3910 + GMC ENVOY XUV 37K lbs Moving Down The Road
The Avatar Is Many Times Around The USA
Nobody Knows Your Coach Like Somebody Who Owns One Just Like Yours