[ShrimpBurrito]

Though I have never owned an A-liner, I've been in one many times. They're very small compared to a Trailmanor. Being so small, I expect it would be much easier to keep warm or cool, but I also have not had issue with doing that in a Trailmanor, except when it is super hot (say, >95-100 F). But again, it is very small -- fine if you're using it almost entirely just to sleep in, but if you're wanting to hang out inside for any extended period, it will be very tight.

Perhaps most importantly, since you say your priority is consuming less gas, even though you probably will save some gas in having an A-liner vs. a TM, my sense is that it is unlikely to be a significant amount. But, an A-liner forum would be a good spot to give you some actual numbers.

For reference, with my Toyota Sequoia (with a 4.8L V8), my highway fuel economy goes from 18-19 MPG to about 12-13 MPG when towing the TM (which is about 4,000 lbs when fully loaded).

Dave