I'm a lawyer and I do not do this type of work. My spidey sense is tingling nevertheless, raising questions about UPL and whether this appears to reduce upfront costs in exchange for a time-bomb of (not so) invisible risk and far greater costs down the line. What happens when things go pear-shaped and the claim is lack of due diligence? "Oh, 'the chatbot must have missed that,' you say?" A single lawsuit from anywhere could easily cost multiple times what the firm quoted.
An ounce of prevention is worth a pound of cure.