> ...consultants who give advice. Startups need someone to do the work more than they need someone to give the advice.

I've been on the other side of this with a few startups, and the right answer is almost never to come in and drop a bunch of code as much as founders would like an extra set of hands.

A good SME can come in and have a solid whiteboard session with a team to shave off the first two iterations of development. I've done this before from a security perspective where just making the developers aware of the sharp edges and being available to answer questions was a massive force multiplier.