So sorry to hear about your Gemini. You were asking about a 2015 Chateau. What model? I own a 2015 Chateau 28F and absolutely love it. It’s great for 2 people since I have the entertainment center above the cab. The king bed is wonderful now that we put a 3” topper on it. We have around 23,000 miles on it and have only preformed scheduled maintenance on it. Well, to be honest, we are always tweaking stuff like you do on any RV, but nothing major. Runs good up the mountains here in Colorado. We have taken it to Tucson the last two winters and lived in it for 2 to 3 months..
good luck.