I have a 2006 Hurricane 31D in the driveway since April 2011. Not a problem with the coach that I wasn't able to take care of without taking to a shop, RV for Ford. We've been averaging about 50 nights a year in the coach and enjoy ever minute.
Check for soft spots and delamination around the storage doors. Thor doesn't seal them very well and water can get behind the side walls. Delamination in general. Roof seals should be soft with no slits or cracks. No soft spots on the roof around the vents, skylight.
Chassis maintenance is based on time or miles which ever happens first. Engine oil changes, transmission oil change, brake system coolant, front axle lube should have serviced per the OEM recommended interval. If the owner has maintenance records even better. If a Ford chassis check the rear sway bar bushings at the axle clamps. They more or less melt around year five. Date codes on the tires are a very big item. Learn how to read the DOT codes for month/year of manufacture. Might still be original which are past their use by date.
You want to see everything working. Potable water, water heater on gas, fridge cold and running on gas, slides in and out, jacks up and down, house and chassis battery volts (both on shore power and unplugged), air conditioner, furnace, generator.
Hurricanes are good general rigs. Needs a few improvements to make them better. Sound proofing material in the engine cover, aka dog house, helps a lot with engine noise. Softer shocks also. The OEM's are a bit stiff, at least for my ride comfort.
Good luck.