If you're self-employed, have your legal shit together even if you trust a client.

Your legal work is not for expected cases when everything is rainbows and unicorns, it's for the times when SHTF. It provides you and your prospective clients with clarity on what to mutually expect.

There will be scope creep, there will be late payments,... You can be lenient, but cover your legal bases so that you don't have to be.