We went all electric 3 years ago. In that time it has evolved into a very simple brewing system. I brew in the kitchen because I hate cold weather, and during the summer we are always on the boat or beach.
My current set up is a 15 gal ss BK and a 10 gal Igloo MT, and a single pump used in a modified BRUTUS 20 setup. There was not a stove outlet with 220 volt in the kitchen as the range is gas and I didn't want to rewire the house to accommodate. So I use two 110 volt circuits. One from the kitchen, and one from the Dining room via a 12 ga cord. Each circuit feeds a 2000watt water heater element via its own GFCI. The elements are driven by individual ssr's that are controlled in parallel with and Auber Instruments PID controller. Until this year I just use locally available high watt density elements from ACE hardware. No major problems as long as I brewed with a high percentage of barley malts, however the Princess (wife) and I both like high percentage wheat and rye beers. I believe the higher gluten content of the wheat and rye malts cause premature element failure. They coat/burn onto the high watt density elements during the boil, causing a hot spot and then they burn out like a light bulb. We now use 110 volt, 2000 watt, low watt density elements with no failure or burnout on problems.
As far as saving time, my system by calculation is slower than a big propane system but while it takes just under an hour to bring our 50*F tap water up to typical strike temps, Because it is very accurately controlled, I use this time for other set up tasks, weighing out and crushing the grains, weighing out the hop additions and etc. So I'm not constantly checking the thermometer or waiting for the water to cool because I got busy and didn't check the thermometer :-[ Based on this savings and recirculating to mash out while sparging has almost cut my batch time in half.
The cost of this simple system was significantly less than a temp controlled propane set up. Plus, I brew in the kitchen during the winter! In my boxers if I want ;D