What's the last thing you did that turned out to be way more expensive than you anticipated?

Friend of mine sold me a big sub-woofer cuz he needed cash to fix his car. Figured how hard could it be? It's a speaker, two wires and you're done. Threw him $150

Spent the whole day getting all these little dumbass connections because I kept forgetting all the stuff you gotta set up. Kinda wishing I just paid someone to do it at this point ๐Ÿ˜‚

Dropped another $300 on wires and stuff because I didn't plan it out first. Big lesson is I could've hired someone to do it for probably an extra $50 and the whole thing would have been over in a couple hours instead of wasting most of my day.

What's the last thing you did that turned out to be way more expensive than you anticipated?
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