Read over the stickies at the start of this forum. AC systems, fresh water pumps, house batteries, fridges, water heaters, awnings and RV generators may require repairs or replacements at around 10 years old and average use. Tires older than 4-5 years old may be unsafe with sidewall cracks from sitting parked in the sun even though they look new. Six tires about $300 apiece. Make sure brakes and engine cooling system are in good operating condition. Brake fluid should be replaced every couple of years to prevent brake fade on long down grades. Learn to use lower gears instead of riding brakes or for climbing grades. Don't let impatient car and truck drivers pressure you into taking curves too fast, pull over and let 'em go buy when safe to do so. Make sure that roof AC, dash AC, furnace, fridge, RV generator, water heater and house batteries and charging systems work properly and know how to operate them.