First, thank you for your service!
The Islander was built on the same chassis as the Country Coach. Very heavy duty chassis. The Islander is a solid coach.
Islander was built by National RV which had one of the better reputations for quality in the industry. Bad economy and poor management brought them down. They were also hurt really bad by one of their vendors who supplied faulty side wall material. Vendor went bankrupt and National stood by their owners spending millions to repair the affected coaches.
When you get home and possibly buy this coach, look into joining FMCA and the local National RV Owners club in your area.