Speeakkking of aiptasia... I've got some nice fairly bright green ones, I would be willing to ship for free
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Seriously - My dad had his whole tank crash (It was only a 30g w/o corals though) due to a fish snapping the glass heater in half literally frying the fish; the water was steaming by the time he noticed. He put the hobby away...
well, 15 years later I discover a conveinent slightly scratched up 30g downstairs on an old particle board stand. I'm using the tank now; figure if it's worked for ballpark 20 years, it should work for another 20 years or so at least.
You can't backout now. Not only do you have the equipment under your belt, you have the knowledge in your head. That takes a whole lot more time than anything; for me almost as long as it took to work to pay off what I learned. (Needless to say, replacing the bending particle board stand wasn't the least of my financial issues)