Help with estimate for 14,000+ sq ft mixed-use rehab in NH

[Jason Muth]

We are looking at our next project, and it's a big one!  Our only problem is that we need help accurately estimating the rehab costs.  Does anyone know a contractor who has specialized in mixed-use rehabs and has worked on similar projects in the area?

The building is a majestic high-profile building about 30 minutes north of Portsmouth, NH and we see a great mixed-use community that will pull people from places like Dover, Somersworth, Rochester, the Maine Seacoast communities (Eliot, York, Kittery, Berwick, etc.), and all of the Lake Winnipesaukee communities, with artist lofts and commercial space for a restaurant or brew pub in an unsaturated market.  We have toured the building, which is structurally sound.

There is other interest in the building, but our sense is that the owner doesn't love the offer on the table or that party's intent for the building.  Most of what we've investigated has been entirely residential, so we are looking for a project manager or engineer in Southern New Hampshire who might have experience in this area.  Thanks!!