Greetings Sixth Scroll,
Yes, a concrete pad and carport would be great. If you can provide power to it, that is even better, as you can keep your batteries on a maintenance charge.
I would recommend that you purchase and use wheel covers when your Navion is stored in your carport. Long periods of sunshine exposure is not good for tire life.
I bet the kids are excited to have a motorhome! I hope you will have a great time in it, and make many happy memories.
Welcome to the forum.
2019 Minnie Winnie 22M on an E-450 frame