There's no denying the triple bunks are tight and nope kids can't sit up in them. But we looked at a couple of doubles and whilst they could sit up in them now, a few more years I don't think they will. So the current thinking is that the triple bunks will be fine for them for sleeping in, but more research will be required. It's a different mindset for the Big Lap than for our current van use. What is suitable for 1-2 week stays is a different kettle of fish when you are talking about living in for 6 months.
Couldn't agree with you more @Smergen , we had a triple bunk van and none of my 3 kids could sit up in bed. The bottom bunk was essentially on the floor too. My oldest was 9 when we bought it and she fitted into the middle bunk but in the 2 years we had it by the time she was 11 she was quite tall and struggled to climb in. Hence why we now have the Expanda. She (now almost 17) gets the rear double to herself and the boys (14 and 11) get the bunks. Triple bunks are great for small ones, but they grow up quickly................