Believe me, the power draw was the first thing on my mind.
My heated vest (CycleGear's Freeze-Out jacket liner) does a good job of keeping me warm alone. It is on the small side, so it clings to my blubber, which means I don't need a whole lot of amps of juice to keep my torso warm.
The gloves will draw a lot of juice at full blast, about 7 amps, which is a lot more than I need, but riding at 70MPH in 38 degree weather will remove heat quickly, so I will be looking at getting OEM handguards to help reduce the need for more heat.
Probably will look into cutting up some black plastic bottles while I am at it....
And, yes, my feet do get cold. Never bothered me until I started taking BP meds, now they get cold easily.
To make the heated vest or jacket, you need at least 33 feet of wire to limit your current draw without adding a big-ass resistor, so picture yourself securing 33 feet evenly on the vest. If you must do it, do the jacket, as it is easier and a lot faster than the gloves.
Heated socks go for $40 to $60, a bargain compared to how much you have to contend with while preventing wires from getting damaged every time you slip your boots on.
The dual remote controller is so small & easy to install, it is not worth even trying to make your own, even for fun. The whole thing fits in my vest's pocket with all three coax leads. Controller is the size of half a cigarette pack and can be velcro'ed anywhere you want. It even has automatic reset overload protection.
1995 Honda CB750 - sold
2005 Honda Rebel -sold
1990 Honda PC800 -sold
2007 DL650 - sold
2011 DL650A - current