I am interested in purchasing a trailer for boon-docking full-time, so I may experience a good share of cold weather. Oliver trailers interest me because they seem like they are very well designed for extreme conditions but with such a high price tag it'd be great to have some assurance about their real world performance. It is difficult to find r values for trailers in general or reports on rigorous real-world testing that compare the design benefits of trailers. I would like to see concrete figures. What amount of propane is required to heat per day in different temperatures and how efficiently it can be cooled? I need more detailed information on this and a comparison of other much cheaper brands before I am ready to consider buying an Oliver.