Heh, thankfully the greenhouse doesn't need to support me as well as an ark, either. After six years (hard to believe it has been so long) the dome is still my favorite structure for a greenhouse. And after fighting off the heavy winds which caused trouble with my hoophouse this spring, I'm thankful that the dome shrugs off 70 mile winds without even a shake.
I'm making plans to move my principal plant production off site, in association with the people who have been retailing my plants this year. This makes the dome more of a personal greenhouse again. I have dreams of producing a much larger, publicly available dome, with the help of more architecturally minded folks than myself, but land is getting so expensive around here.
I make my money with computers, photography, and writing. I may have a plant business, but the business is all about spreading the plants and the knowledge around. My goal is to break even financially each year and get my plants and assistance into more places. It's about trying to do good things for people with plants, and the business lets me do things (e.g. cover the costs of growing 10,000 plants each year, purchase wholesale material) that I couldn't do otherwise.