I am working on getting my service for the new shop upgraded and am going back and forth on what size I need. The service will provide power to my mostly one man sometime 2 man shop, my wife's glass fusing studio, a small store front, and a 4 bedroom house. My largest tool is a 20hp wide belt sander. I also have several more 7.5hp tools. My wife's largest kiln will draw about 90 amps. I was originally going to go with a 400 amp service however you can only constantly draw 320 amps for a standard 400 anp service so now im looking at a 600 amp service but the cost is almost double. What size service are other guys running?