My contact retired but Murphy Austin has a pretty extensive real estate practice for developers.   

BUT if you really want this property I’d get an extension on the inspection contingency and get some quotes on the major repairs ie. roof and also have that attic cut out and inspected.

She does it herself and has written extensively about it on the BP blog. 

I always did my own UNTIL I GOT AUDITED....then went through several tax prep CPA's with the run of unnecessary filing extensions, missed expenses & the usual data entry mistakes their seasonal workers make. 

The August extension added a so-called Phase Two option of applying for permits to put tables on closed-off areas on public streets.

Although an extensive rehab was in order the equity was there to allow us to refinance upon completion providing an excellent cash flow.How did you find this deal and how did you negotiate it?

Expect more extensive rehabs and less cashflow initially.

If we do extend their seller lease back, it will be on a new agreement with a minimum of 2 months and monthly extensions after that.

Do you have extensive rehab/project management experience? 

I generally use 4-6 dumpsters per gut renovation (>2000ft2) or new construction duplex (>2000ft2).Window replacement ~ $300-350/window, simple vinyl window without the need for extensive exterior siding work, not including interior trim work.Flooring - I would say laminate and LVP flooring install should be around $1.50-$2.00/ft2, material would be anywhere between $1/ft2 to $4/ft2 (anything less than $2/ft2 is crap).