Ok, let's break this down. You mentioned the following:
Handle all of our digital marketing.
Build us SEO pages.
Handle our PPC.
etc.
These areas can mean so many things because they vary so widely. The build-out of all these parts (custom landing pages, external sites that contribute towards SERP optimization, PPC keyword research/management/constant tweaking) is actually the easy part.
The harder part, the most sophisticated part, include things like link-building, A/B split testing of landing pages, organic keyword ranking. There's a lot that goes into that. I would ask any vendor how many hours they are going to spend on your account each day. Not week, but day. This is a daily job - and can easily be a full-time job - not weekly... so the if they say, "Oh, about an hour or two a day." It might be worth it to dig a little deeper to see exactly what they are going to do.
The entire key is to get details.
How much detail did you get into with PCG?
I can't do the work but I would be happy to talk with you on the phone to flesh out where you are right now with respect to your competitors, who has done what so far, where you fall in the pecking order (1st place, 2nd, last?), what you really need vs. what vendors tell you what you need. So feel free to message me or you can ask questions here - DR is filled with smart peeps.
