@thonyc1968 The Grow Span and that first Gothic greenhouse seem like good greenhouses, but I've never seen them upfront and in person. The CT Series is really not a farm greenhouse, and I would stay away from any greenhouse made in China at any price. I notice all of the greenhouses you are looking at have a clear glazing. May I ask why you are choosing a clear glazing?
I am just wondering since you said you are a "small farm", do you sell what you grow, and are you looking at large hobby greenhouses because commercial ones tend to be so large, although those first two could certainly serve a small commercial farm?
One greenhouse that comes to mind is made by Conleys. It is a commercial grade greenhouse, but on a smaller scale. It is extremely well built, has an excellent price, but requires some "building knowledge" to put together, so if you are looking for out-of-the-box, this one might not be for you. (Even though some out of the box greenhouses are hard to put up.) You would wind up with a good sized and durable greenhouse, like you're looking for, at a much cheaper price.
Take a look at Conley's Hobby House at www.conleys(DOT)/pages/hobby-house (Aside: How long does it take to get link privileges?)
This greenhouse is a scaled down commercial greenhouse. It comes in 9, 12 and 18' widths. It is made from the same rolled steel frame that they use make commercial greenhouses. It can be fitted with polyethelene or rigid covers like twin wall polycarbonate. And, since the parts can be nested for shipping, the freight is less than a typical out-of-the-box hobby house.
I had a 1/2 hour conversation with one of their reps just today because I am thinking of carrying their Hobby House on my website. I was quite impressed with what they can offer in quality at a good price. If you want to PM me, I can give you the name of the guy I spoke with and his number. (It's his cell phone, so I don't want to post it publicly.)
Can you explain a little more exactly what you will be using your greenhouse for. Recommendations are tough without more info.
Include:
What size you are thinking of, although the ones you have looked at so far are all different sizes.
Will you be using it for personal or commercial use?
What do you plan to grow?...and will it be seeds to starts or seeds to full maturity?
What seasons do you plan to use it?
