These studies are often done for a flat fee or as an initial phase of their overall services. 

So in your case of a duplex you would have two electric meters, two water meters and two gas meters.Now with that being said you would also need two electrical panels on the inside of the house with separate wires running to each unit.

Own a flat surveyed vacant lot, behind my lot is a small strip of land appx 12' long by 100', the edge of this section is a pretty steep embankment.Neighbor A owns it, and lets Neighbor B park on the small strip. 

@Greg DickersonI wouldn’t do it without a GC, would definitely use one for oversight and try to work out a flat fee.

You could offer to pay him a flat 3 months rent in advance to let you out of the lease.

This is a flat membrane rubber roof.

There are eviction attorneys that will handle all of this for a flat fee usually under $1,000.  

While living in the house, we made a few updates: we removed old paneling, we added a safe, and we repainted the house.

While living in the house, we made a few updates: we removed old paneling, we added a safe, and we repainted the house.

So I have a 2-flat that I'm house-hacking and I'm working on renovating it, but the job is bigger than I thought and I'm trying to figure out the best way to pay for a larger remodel than we originally anticipated.