Hauling Cattle in a Horse Trailer

I currently have a 20 foot stock combo trailer that I am use to haul to both cattle and horse shows, it has a 16 foot livestock compartment and a 4 foot tack room.  It has served me well for several years but as we start to spend more time a horse shows I an seriosuly considering buying a horse trailer and trading in my stock combo.  I will probably buy a cheap steel trailer to haul cattle but wondering if anyone is hauling show cattle in a horse trailer.  I am looking for something similar to this:

http://www.ehorsehotline.com/ClassifiedDetail.aspx?AdID=9339&user=386

The rear tack folds down, the slants pull out, and you then you basically have a livestock compartment that you could tie cattle in.  We don't go to a lot of progress show but do go to a few small ones that are local and I was thinking a trailer like this would be nice to pull to something like that, you would have a toliet, fridge, microwave, etc.  Anyone that shows horse and cattle pulling a horse trailer to cattle shows?

Only problem will be getting enough ventilation back to the cattle.

We've done it a few times and I find it challenging. Make sure the trailer doesn't have wheel wells in the inside area where you would haul. To me it seems like the inside is smaller and harder to load and unload cattle. We had no problem with ventilation due to the fact that we had drop down windows on both sides of the trailer. We ended up getting a small bumper pull stock trailer to transport cattle to shows and the horse trailer is doing what it was intended to do. This is just my personal opinion.

Jordan