What's the Right TM for My Family?

I have been looking at used motorhomes for the last 3-4 months and just recently stumbled on the TM and I think this is the way to go for us.

The question is which model? I would prefer to get something used but no more than 5-6 years old (unless you can get everything I need in an older model). My wife and I have two young girls (4&6) and would occasionally travel with a friend. Trips would primarily be weekend getaways within 2-3 hours of our home in Northern CA.

I want something that will be big enough for the next 4-5 years. Would expect to purchase another one at that point.

I have physical space to park either size of the TM.

Thanks - Rob