My grandparents passed away and we inherited their cats. One of them is an older feral cat that has been around here for over 10 years. We had unseasonably cold weather this winter, so we live trapped him and he's been in the "cat" room since. We are moving to our new home soon, and have decided to keep him indoors since it is a rural area and he's old. I was wondering if anyone has any tips to make the transition a little less stressful for him. Also, we won't have a "cat" room like there is here, and would appreciate any ideas to make our house hospitable for a feral.

PS. He does use a litter box.