I would watch out with project management as a line item. I used to work for a big company and had a client who own a pro sport team and there gc made us document everything. Project management hours were a must around 40 hours at $150/hr.

But I just got a tv hang from a rival company because they add over $300 project management to switch out a tv. Client got really pissed over that and I'm there new av guy and there are planing to do a lot of work in the next 6 months.So $300 could cost you a client if you put it on a small job.