My friend Greg Stadlin of Collier RV in Northern Illinois referred me to one of his clients, David. David did a complete renovation of his 37 feet RV which included two new slide outs. I spoke with David today and he said he spent $150,000 to renovate his RV with two new slide outs, interior and exterior. He will send me pictures of before and after of his RV. I can stop by the storage at Collier RV and take a look. I have a 2001 Tiffin Zephyr 42 ft. coach with only 52,000 miles I was thinking of trading in for a newer one but am afraid of losing value. RVs depreciate more than any other property or vehicles.