Advice please

If you meant "ultra lite" instead of "ultra lte," my concern would be that you are considering full-timing (even if for just a year) in an ultra light RV. In order to reduce weight in an ultra light, some of the things that are "cut" are the weight and quality of materials, thickness of walls, and insulation. These conditions would combine to make the unit very hard (and/or expensive) to heat in the winter and cool in the summer. Of course, you can find examples of people full-timing in almost every type of rig imaginable (often not out of choice), but most full-timers select an RV based on a number of livability criteria - and at the top of the list is the ability to handle different weather conditions.