Dein211, have I got good news for you! Here's a device that will save your life:
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Most of the people on here use Pythons to drain and refill their big tanks. When I'm draining Spot's tank, I use it like a syphon with a really long hose and let the water drain out the back door into the yard. When refilling the tank, I attach the Python to the kitchen sink and just turn on the water. It's ever so simple.
It's possible to drain the water into the sink with a Python but that didn't work as well for me as letting it drain outside. You might try it both ways and see what works for you.
I like your plan to get a stock tank. If you had a Python you wouldn't need one with a plug and that would increase your options manyfold.