That's a very nice and cheap setup you have there. Not to mention easy to upgrade as you desire. It would be easy to eventually add a pump to your frame so you could transfer the water using the pump if you ever get tired of lifting. That is important if you ever plan on doing larger batches. I find lifting a cooler with 10 gallons of water to not always be the best, especially since they don't seal well and the hot water can splash out.