Yes by aluminum I mean outside siding, whether it be an Avion-like or older Lance. I just am not aware of an aluminum sided TC with a slide. Were they ever made? A large TC sans slide would be fine too, just depends on the layout. I like the overhead bunk idea that makes the 5th bed.
3 older kids, they are tall but skinny. I really like Northern and Bigfoot but the newer ones just do not have a good layout for us. Maybe an older one changed? Even putting the kids in the big bed with us in a smaller would be ok.
I will look at the 830. Keep the suggestions coming. The DW really likes the 1072/1172 but the wrong outside material.