Hi Jacques..glad we could get you going in your search. Regarding your plants surviving while you are gone, there are some greenhouses that you can rent space from and they take care of your collection while you are away..some of them call or email to let you know something is in bud or bloom so you can collect it and enjoy it at home..this would also let your collection expand beyond the window sill ( not that we are encouraging you
). Your new orchid society might be able to give you some ideas about that. I had 350+ full size plants a few years ago and decided to take time off and go sailing, there was a greenhouse an hour away from me that would have taken care of my collection for about $90 a month.