I had just about that many orchids last summer and I put them all outside for the summer. I bought a fold down 4 shelf green house with a plastic cover but never used it. They went through wind, rain, thunderstorms, etc. I did make sure to position them so they got sun in the morning until about 11:00 and the ones that don't like much sun I put on the far side so they didn't get any sun. They also got a little sun from about 6:00p.m. until sun set. I watered them a little more and misted them once and some times twice a day. I didn't have trouble with rabbits, etc. but I did keep them up off the ground. They have done beautifully and many are blooming this spring. I am putting them out again this spring for the summer.