Unless your water is really nasty, the anode rod should last more like 5-6 years, so every year seems excessive. I suppose you could take it out at a year and see what it looks like, replace or reinstall if okay. After a couple of years, you'd know how long they really last. Draining helps more with efficiency and volume than longevity. Replacing an anode rod is essentially shut off the water, unscrew the rod, replace, turn the water back on. The hard part is loosening it. Invest in a handyman's impact wrench the first year, and you'll come out way ahead. If there's any way to run the WH runoff to a drain, install a pan to collect the water. Since most WH start by dripping rather than a catastrophic failure, a pan and some sort of a moisture detector seems like a good investment if you want to prevent a flood. There are some that will shut the water off as well. check out www.wagsvalve.com while it is primarily designed for a gas WH, it will shut off the water supply for an electric one as well. Since it won't shut the power to the WH, on an electric, the elements would burn out, but if the tank was leaking, you'd throw the thing away anyway, so it's not a big deal.
You may want to get the water tested, and consider some treatment if it is that aggressive, as it would be taking its toll on the pipes and valves as well.