When my wife and I were alive we bought sa 38' Class A Gasser. it can tow up to 4,000 pounds (5000 pound hitch but only 4,000 pounds difference between scaled weight of House and Max CGVW rating of 26,000 pounds)
I tow a 2,500 pound 2001 Dodge Neon behind it , added lube pump to keep tranny cool while I tow, Takes me less than 5 minutes (Way way way less) to hook up and "Drop" (2 pins, two safety cables and the 2 brake control Snap Pull Click and done) 8 MPG consist, 25 MPG running out to dinner et-al.
Modern cars do a whole lot better on the "Run around" (like 35 or more MPG)
Think about this 100 miles of Round Running, at 8 MPG is 12.5 Gallons
At 25 it's 4 a savings of 8.5 gallons or about 21 dollars.. It is 17 miles to CDhurch (34 round trip) from where I'm parked. So I drive at least 70 miles a week. The car cost me 2,000 and fitting for towing 2,000 so at 15/week it would take me 266 weeks to pay for the car.. 5 years. I've been driving It will have paid for itself later this year. (I got it summer 2013)