I read in an orchid magazine some 13 or 14 years ago of a man in New York who converted an alcove he had into a growing space for orchids. He made/bought glass doors and shelving and made it like a huge terrarium with a sprinkler system and heaters, fans and just everything orchids need to grow. He managed cram in 400 plants! Just shows you that with just a little imagination you can utilise the smallest of spaces for creating your own jungle!