Thanks for the knowledgeable reply @Yeaster, it's good to know why I have a lack of suction.
I haven't figured out what to do with the output yet so I left the whole 25 feet of it intact LOL.
There is only one window in this room and it is about 2 feet from where the exhaust exit is in this picture. It would be ideal to just vent it straight out the window but that won't be good when it's below zero outside. Well it would be ok since no cold air will get in while the fan is blowing out but this window is my only source of incoming fresh air.
Here is a picture of the ghetto way that I vent my clothes dryer in another room but I don't leave it in all the time, it just goes in the window when I dry clothes. AND I'd have to make one of these with 2 holes, one for intake and one for exhaust. I don't even know if that would work? This room will get mighty cold If I import air from outside directly into the room. If I brought outside air directly into the tent itself it will be very cold inside the tent I would think. In another two months it will be 30 F outside. My lights only generate 4 degrees F of heat inside as far as I can tell.

This picture is upside down, no idea why.
Any thoughts on how to handle the import and export of air from the tent is much appreciated. I am not willing to put a heater in the tent, that just feels like a fire hazard to me.
Thanks !
The hygrometer that you see in the photo is not where it will live. I just took the photo that way to show a friend everything that I bought for the tent and I took that photo as soon as I was done setting up. The transmitter thingie will be inside at canopy level and the receiver you see in the photo will be outside the tent on a table.