Since the trailer is up at camp for the summer, I decided to go with the Hott Rod electric kit. A guy on ebay, seller name rvtoyboys is selling the Hott Rod kits with the name cut off the packaging for 70.00 and free shipping.
I ordered the 10 gallon, 625 watt unit and he exchanged the atwood bushing for a suburban bushing with an anode. Kit normally comes with both bushings but no anode.
Install was a piece of cake but at the moment, with it being up at camp, I have it wired up using a 3 prong extension cord to an outside plug. Once I drag it back from camp, I will wire it up internally with a switch and indicator light.
To say I'm thrilled would be an understatement. It obviously takes longer to heat up and recover than propane but I turned up the t-stat to about 135 and it was able to give 2 adults and 3 kids nice warm/hot showers. We are pretty good at doing stop/start showers, turning the hot on only enough to get some flow and control the temp with the cold. If that makes sense.
And obviously it is much better than no hot water. Not to mention much cheaper than a gas valve or replacement water heater.
Only had one strange issue. The water heater door faces the afternoon sun and it is hot, really hot down here, 94+ today. So the water heater door was baking in the sun and it looks like this kept the t-stat from detecting the temp had reduced on the pressure relief valve. This left me with lukewarm water. Once shade hit the cabinet, I had nice hot water in about a half hour. This wasn't a major crisis as no one wants to shower, cook or do anything but sit in the pool at the campground during peak heat. I'm going to look at adding some water pipe insulation and leaving an opening for the pressure valve for safety.
Granted this is not a 100% replacement for a propane or real propane/electric unit but I'd give this kit a solid B+ for effort and an A+ for expense.
