Greenhouse Features wanted/needed -- recommended?

[ElkinsFFA]

Howdy!
We are the Elkins High School FFA, and we have built a fairly good sized greenhouse. We wanted to do some research and see what features everyone liked to have in a greenhouse. I have posted pictures below and here are some of the details of the greenhouse: The trim is all rough red cedar. The frame and supports, including the roof, are all treated pine. The facing and board/baton is all white pine stained with Australian timber oil. Let us know what you think!
Also we are new here, just wanted to do some research and make sure we created a quality product. Thanks in advance!

[tomf]

A water source, power to run lights and a exhaust fan to keep the greenhouse from over heating. Roof vents that open to let out the summer heat.

[Bobberman]

Looks good. As much reflective material on back walls as possible which will increase light to plants! White will also do the job!

[rainbowgardener]

Is there an air intake down near floor level to pull cooler air in to replace the hot air that is vented out near the roof?

It is very beautiful, but seems to have a ton of wasted space. The wooden shelving is gorgeous but opaque. If you used wire shelving, you could have another shelf at the height of the window pane and you could plant in the ground under the existing shelf. You could also have a couple bars running at ceiling height to hang baskets from.