Kathie, that is a stupendous greenhouse! We have one of those portable structures, it's been around for...lets see...nine years now and looks it! DH and I have tossed around the idea of turning it into a green house. Currently it's a woodshed.
Your husband did a beautiful job of it, and in fact your outside landscaping is very pretty too.
Thistlebloom & Majorcatfish and anyone else interested,
if you are interested in how we built it step by step, we'd be happy to share the info with you. Let me know if you're interested and I'll send you pictures of the construction details and step by step instructions. Our tent had been in the yard for ten years also when we decided to change it into a greenhouse. Let me know.