Sorry to hear. Back in 2001 I felt about the same way when we returned from vacation only to have the smell of rotten egg hit us upon opening the door. Ca went through the so called brown outs but in reality it was caused by corporate greed and market manipulation. Anyway, lost power back to back to back and then some and we lost our 100 gallon tank. At first it was the same thing, just air out the house then take it all to the dump in the morning. My daughter said don't, helped remove dead coral and fish, make some quick water using tap, and left it on auto pilot for a few weeks. Amazingly, rock was still alive more or less as was the deep sand bed. Quick water change and cleaned the rocks, checked water, then added a pair of clowns to call it home.
We left it that way for over a year and watched some basic coral, mostly zoas, reappear while the rocks and sand bed continued to thrive. I ended up taking down the tank and moved the sand and rocks into two 29 gallon biocubes. Tanks thrived still, no issues, and about a year ago I consolidated those two tanks into a single 40 breeder. Same rock, same sand. Ironically, I'm now planning a 240 or so gallon tall tank in which I'll move the rock and sand again

So while I did lose a tank I still have the rock and sand dating back to 2001 or earlier after my daughter said no, and helped.
If the budget works out to do a minor upgrade, then do it. Otherwise, you can always keep what you have and downsize for a bit while you prepare for the next tank. Accidents and mistakes happen, we live. We learn. We adapt.
Again, sorry for the loss but sounds like you are on your way to a pretty solid recovery. Best of luck.