Your best option for an affordable used car is honestly to take a gander around your local Carmax. Tell them what your budget is, compare the price to what kbb.com says its worth, and ask for a carfax report.
If you're looking for a cosmetic operation and an affordable used car at the same time, I'm not sure what to say...
Use the proceeds from some of your professional work to buy that used car, use that car to expand your territory, and use the additional revenue to finance your cosmetic desires?
Education begins the gentleman, but reading, travel, good company and reflection must finish him.