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+---- Thread: What's the most expensive startup mistake you've personally made (/showthread.php?tid=6328109)
What's the most expensive startup mistake you've personally made - Johnfisty456 - Jul 7, 2026
Not asking theoretically.
Actual money.
Mine was building before validating properly.
The product worked.
The market didn't care.
Cost months of work.
Curious what everyone else's most expensive lesson was.
RE: What's the most expensive startup mistake you've personally made - G Reviews - Jul 7, 2026
Mine was spending a fortune producing the product and then having nothing left for actually marketing it.
RE: What's the most expensive startup mistake you've personally made - Yakless - Jul 7, 2026
Starting a company with someone who was my "friend" as the lead dev, and he just kept wanting to scale, spent about $20k, and left because of one argument.