For less than $100 and 2 hours I built this greenhouse for our raised bed garden using just electrical conduit and some painters plastic. Great row tunnel for winter veggies. I built this whole thing and video in less than 2 hours. A couple of short videos of the process.
Great temporary green house, I plan on moving the bed to a better location in the spring and just wanted to get something up for this winter. I broke down what my costs were buying from our local Home Depot, I already had the 2 posts and ridge beam 2×4, but I checked on the price for those as well. Our raised bed is 10′ x 20′ but I only wanted to cover half that.