I can't believe I did not list this as my #1 "Do" in my previous post, but your forever home should NOT have stairs. Period. A small step up but absolutely no stairs. Many of us do not think about this in our 30's or 40's, but it's a strong consideration IMHO.
Most of us will make it until our 80's or 90's (called a nonagenarian if any are interested; the only reason I know this is my Mom turned 90 last year) and a huge percentage of us will have mobility issues and stairs are so limiting in so many ways and also downright dangerous in worst case scenario as we get older.
Eddie