Shade House/Portable Greenhouse

[Lilavati]

I move my orchids outdoors for the summer. Last year I used the front stoop (which is shaded) but my collection has grown to the point where the stoop will not serve. So, I was planning to buy a shade house, like this one (I am not at all handy)

10' x 10' 50% Shade House: Portable Canopies and Shelters from Shelterworld

However, I think 10 X 10 might be a little big for my needs, so while looking at alternatives, I came upon this:

Amazon.com: OrchidHouse Greenhouse: Patio, Lawn & Garden

Does anyone have any experience with this thing? Worth buying? Junk? Better/Worse than a frame with shade cloth (in winter the orchids will come back inside).

Also, what percentage shade cloth should I get . . . I have everything from Brassovolas to Paphs . . there's some natural shade, and of course I'll use the bigger brighter light plants to shade the others . . . and possibly leave a side open for the bright light lovers . . . but what should be my default?

Thanks!