I finished my first greenhouse about 10 weeks ago and will post some pics for anyone who would like to have a greenhouse but doesn't have a lot to spend. Total with fan, humidifier, AC unit was less than 550.00. I started with an Abba patio greenhouse kit from Amazon, 6' x 8', for 169.00. I got a small Honeywell cool mist humidifier from Amazon for about 30.00, A 15' industrial fan for about 20.00, a Frigidaire 5000 BTU window unit from Lowes for 129.00. Built a base out of 2x12 treated lumber to stabilize and raise the greenhouse 12 inches. I also purchased a Zoo-Med HygroTherm humidity and temperature controller for 50.00. The humidifier is rarely on in fact the Window unit is essential in decreasing the RH in the space. RH is fairly constant at 83 to 87%. So far I am extremely happy with the results. I am sure winter will present new challenges. I am working on ways to introduce fresh air during the winter when the outside temps are lower than I want to introduce into the space. If anyone has any suggestions they would be welcome.