Before I post the links to the greenhouses. I would like to mention that all my succulents that I have right now fit on a 4 by 2 foot table. Which one of these green houses would be good for me? http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=93358 http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=47712 I just decided to buy a green house this year since I don't have the skills to build one yet. Or would using brackets with wood like in this kit be better? http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=33707
A few considerations to think about. What are the temperature requirements of your specific succulents? For example, some may actually need cold winter temperatures to stimulate flowering in the spring. Some may be killed by temperatures less than 40*F. Are you going to need heat during the winter? On the other hand, excessive summer temperatures may induce dormancy or even kill some plants, so having automatic vents is desired. Those plants you have may be small now, but depending upon growing conditions, may become massive. Do you have room to place some on the floor versus simply on shelving? Do some research on the specific growing requirements of your plants and that shall guide your decisions.
I know that none of my succulents will get massive. I would like to mention that I'm only going to keep the succulents in the greenhouse during the winter and have them outside all other times of the year. the reason for that is I would like to save money by not have to pay to cool them down in the greenhouse(and it would be easier on me).
That said, then pick the largest one you have room for and can afford. Depending upon your area, there may also be local size restrictions with regards to outbuildings. Automatic vents preferred. Then, depending upon the volume of your greenhouse, pick an appropriate heater. Fan(s) for air circulation are also preferred. The larger the greenhouse, the more temperature stability you will have.
I Just called the harbor freight in my city. They carrying both the 8X6($299) and the 10X12($599). I think I'm going to get the 8X6 in a few months. It'll be the best one for me right now.