***Are these a good buy? Any one got betters?*** +rep for good help always

Okay so I made a grow box myself out of reflective Styrofoam boards(4ftx4ftx7ft) works well but would like something a little more...uhhh lets say insured. So ive been looking up grow tents online for my mother(s) and clones. Found this grow tent for $899 usd Free Shipping on ebay.. http://cgi.ebay.com/HYDROPONICS-GROW-TENT-48-X-24-X-60-GROW-BOX-CABINET-/160478643747?pt=LH_DefaultDomain_0&hash=item255d45c623
Top rated seller
Great rating

Alos...
I need exhaust.. My Veg box wont be too hard so I found a 230CFM axial fan for $20!
Which is here... http://www.hidhut.com/catalog/flat-whisper-fan-230cfm-p-1373.html

But also my Flower box gets hot. Im hooking my boxes both up to the vent from my swamp cooler in that room. But to exhaust I found that first fan for $20 (if its good) or i found two others..
This one is about $30 4in 250 CFM http://cgi.ebay.com/ebaymotors/Marine-boat-bilge-air-blower-fan-4-inch-line-NEW-_W0QQcmdZViewItemQQhashZitem483cd5b731QQitemZ310258284337QQptZBoatQ5fPartsQ5fAccessoriesQ5fGear

An axial fan w/ 550CFM for $85.99 http://www.bghydro.com/BGH/items.asp?Cc=EF&iTpStatus=0&Tp=&Bc=

^and the one in that page about it (6in)

Im not cheap, just easier to study in school w/o a REAL job lol.

Thanks repliers, especially first hand and experience based ones.
++reppp

It's cheaper just to drywall a portion of a room off than it is to buy a tent, I did it in my old aprt. took four feet off my master bedroom and made a 4x9 area. Cost me less than $200 and thats with a $40 can of paint to match the rest of the room.

lol woops dude its $89.99 lol sorry bout that but yeah i agree with that but still theres alot more work than that and this is cheaper thx anyways