You might be better off with a Portasol or a Weller Gas Soldering Kit. They come with a hot air tip (good for heat shrink) as well as tips for soldering. Advantage being use anywhere if you race outdoors.
Good for quick soldering ESC's and Motors without over heating.
Electric need quite High wattage (at least 50 watts minimum) and a large tip. I use my gas iron when I need to solder motor tabs.
By the time you have paid for a decent electric one the difference in cost of a portable gas iron is not much.