When my wife and I got marred, I built a A-frame out of a old wood swing set. It was quick, cheep, easy and collected a lot of sun.I'm not sure what type or size yet as I've just started my research and want to see what options I have. I'd like to have a place for my new spring plants so I can start them earlier. The spring season where I live is brutal. I'm going to setup hoop houses for this year, but would like to upgrade at some point.
You can get the brackets at Lowe's fairly cheep,
I can grow over 100 plants from seed to planting size in this little greenhouse.
Chris