I once did some consulting work for a funded startup, for me it was the biggest contract I ever had (about $20k) and the project didn't really work out, but the

I once did some consulting work for a funded startup, for me it was the biggest contract I ever had (about $20k) and the project didn't really work out, but they didn't care and just paid my invoice. It was so nice to be treated like a professional. On the other hand, small clients who paid $2k for something kept coming back with revision requests...