should I just pack it in???

[TheReefGeek]

You could sell off all your livestock and live rock, and try keeping a nano for now. That in turn might spike your interest for a larger tank again.

I have found with a bigger tank it is much more difficult to "recover" after things slip away. When my tank crashed from the bad batch of instant ocean salt, and I lost all my fish but one, and 90% of my corals, I almost packed it in. But finally, now, after almost 8 months, my tank is healthy again, and I am glad I kept at it. It was so tough watching a tank covered in hair algae for months and months though. Now if I could just kill off the aiptasia buggers that got a foothold, I would be even better!

Anyhow you could try a nano for a while, just an idea.