For you tow vehicle, that KZ seems like a good fit. We had an Apex Nano 193 BHS, which is a very similar floor plan. Our family is my wife and I, two young kids (5 and 3 at the time of purchase) and two large dogs - 85 lbs each.
One thing I notice about the KZ is no sink in the bathroom. That was a must for us - I didn't want my wife to be prepping a meal and someone to have to come wash their hands right there after using the bathroom.
The Nano lasted us a season and a half, mainly due to bad weather luck on trips. Being stuck inside all weekend in that small space could get rough, so we upgraded and I bought a truck. However, I wouldn't have done that if I wasn't certain that years of RV camping were in the cards for us.
