Wow, thank you, that's sooooo helpful. I've been looking for something like a PDI list but didn't know what to call it. That's incredibly comprehensive and helps newbies like me who can't trust instinct on anything and don't even know what to look for.
Good point about having a trial run. I'll look into it. The ceilings of the TT's we visited were were way too low for my husband, flat or not.
Based on your responses, I feel like I'm making an issue out of a non-issue.I'm guessing that I just need to keep looking and step inside more until one feels just right. Thank you all for your help and perspectives.