Some of the shorter models have interesting floor plans that do the best to get the most in a smaller space. As many have already said, it is what you want and can tolerate in terms of "closeness".
We have gone the opposite direction over the years. We started with PUs when the kids were little, then graduated to a 24' TT w/o slide when they were teenagers, then to a 28' w/ slide when they were college age. Despite the fact they only come with us occasionally, we like to have the capacity for essentially 4 adults at this point, without stepping all over each other. The extra wide bunks in our 28' provide enough privacy and storage space for my daughters when they do come with us. When it's just me and DW, the TT is very spacious.
I would have loved to have this TT when the kids were younger, but I was financially and tow vehicle restricted at the time.
Ironically we have lived in the same (relatively) small house since the kids were born, and never upgraded to a larger house. So maybe our TT is compensating for that.
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2014 Keystone Bullet 281BHS
2002 Chevy Avalanche 5.3L 4x4
Equalizer hitch
Nights spent camping in 2015: 25
Next trip: mid-April 2016?