It would help to know more about how long you will keep the RV and how you intend to use it. If you intend to use the RV to live in, while working, or whether you intended to tour the US and camp in the RV along the way, let us know. It is possibe to buy a fairly nice used 27 foot long Class C motorhome for $24,000 but you may have to spend considerably more on new tires, brakes, engine cooling system, and upgrades/repairs to make it fully safe to drive, reliable and comfortable with working air conditioning, furnace, generator, awning, etc. Most RV's use the same brands of appliances, air conditioners, furnaces, refrigerators, etc. These items often need expensive repairs at around 10 years of age in normal use.Tires that are older than 5 years old may be unsafe and need replacement regardless of appearance or tread depth to effects of sun and weather and just sitting parked. Take your time and learn as much as you can before buying any RV.