I have a keg flipped (using a triclamp on the top fitting). I am using a old bottling bucket with a pump attached to the outlet as a stand (stumbled across this by accident). It is a cheap pump after a quick rinse and the discharge runs clear I add some pbw and recirculate. Sorry about the pics I need to rotate them, but not sure how. Total cost less than 150.
Keg - free
2000 W element ~$10
Triclamp, gasket and cap ~$15
Weldless valve ~ $20
1in nut/gasket ~$10
Power cable ~$10
Cast electrical box, extension, switch and cover-plate ~$15
misc fittings to attach pump to bucket ~$10
Pump ~$50
Bucket - Free, it was ready for retirement
Total ~$140