Thats not the reason to sell any cows, carts are just a hobby that we got started around here again.  We put in one clay oval this year already and looking to build two more at other neighbors this summer.  Within the last month there has been about 20 carts bought/built and more every week.  I think everyone is getting cabin fever as we all farm and can't even more any equipment so I guess we will cart for now.  Not really to big of a money pit cause we are running a 6.5 HP clone motor class.  Those motors are $140.00 with the extended warrenty at Harbor Freight.  We arn't racing at the big tracks just ours on friday and saturday nights, well at least not yet!!!!  Umm last I checked showing show steers was a money pit also but hey everyone has to have a hobby.