Thank you for the compliment. You most likely will not like the jet burners.
Neither of these photos are very good, but should give you a basic idea. There are a lot of very good threads on PIDs and building control panels.
Electric element in a cooler is a great idea. We use a RIMS tube from BrewersHardware (read $$$). We don't build with kegges or coolers only kettles, so if a customer requests we supply the RIMS, that is what we use.