Welcome to the forum! Several members here have Hi Los of that vintage, and love them. Like any other RV, Hi LOs require maintenance, goes along with having fun camping in style.
As sam said, view the videos. They can be found toward the bottom of the home page under "reference library". Under the heading Hi Lo Owners Manual. First one are the videos. Take your time viewing them, full of info. There are 32 short videos.
Like any other RV, we don't want leaks anywhere! So points of entry, such as window frames are key. Ask questions, learn your unit and you'll be a much happier camper.
2703 Tow Lite
Bonita Springs, Fl. &