Thank you all for your input.
Being that I am putting in a wall I think it may be a good idea to build a shelf on the outside to have the pump sitting out of the room. My main thought was heating, but Alan has sealed the deal for me.
I am getting an extractor fan installed to come on when ever I turn the lights on as well as using the heat pump fo heating, so I think that should cover the ammonia scent in the room, if not I am keeping a functioning window and I am making the door 4 foot wide.
On the note of pumps, whatare some worth looking into? I have seen a couple on Trademe recently around $50, 35W and 50-60L per minute. To run air into roughly 40 maybe more tanks what rating should I be looking at?