I have older friends (75& healthy) that want me to help them install a 400 watt system in their van. They don't plan on a conversion to a living on board setup, just to go on 2-3 week trips all around the country every few months or so. They boon dock 2 nights then find a shower the 3rd night at motel or park where they can plug in power if they have to.. They have a bed and a few benches but nothing big time. It's just a stripped Transit cargo van. I am worried I am putting in to big a system with 2 100ah batteries. Do you think maybe going with a Bluetti would be a better way? I wonder if it would be easier for them, I am afraid that my system would be a little complicated for them. He is all for the solar set up I am designing but what do people here think. They are not hurting for money.