If you "don't want to spend a lot of money" on a tow car I assume you want to have a car that gets good gas mileage and will also be used as a daily driver so you don't have to buy a dedicated tow car. If you are thinking along this line a small manual 5 speed that weighs less than 3000 lbs would be a good choice for a gas MH. I would look a a used Corolla, Accent, Versa, Fiesta, etc. Find something you would want to use as a daily driver then check with the Dingy Towing Guide for the year vehicle you are interested in and verify that it can be flat towed. These cars will get 40 mpgs on the highway and offset the 8 mph you get on the MH.