I don't know if you've looked into eBIAB setup's, but that is where I am moving to. Can be done indoors (as there is no open flame), brew your beer at a fraction of the costs (electricity vs propane), and you can be constant and efficient of mashing temps (PID controlled heating element). It is a little bit in start up costs, but I believe it is well worth it and pays off in the amount in gas you'd spend. To maintain and possibly increase my efficiency I am planning on constantly recirculating the mash with a pump. I am going to be posting my build with pictures here in the next few weeks, keep an eye out for it if you're interested in going electric.