Get their views on the alternatives (sell as is vs. tear down, rebuild and sell).

Where do I get demolition and rebuilding costs?

And if he can help with planning and advise on process (which phase of the rehab goes first, what materials and tools are good, etc.) is like having a GC in your pocket.Here is another tip: in my area, Home Depot stores offer workshops - you can go and learn how to lay tiles, vertical tiles and backsplash, how to rebuild a toilet, install fans, how to use tools, etc.

Instead of tearing down the house as I expected, they stripped it down to its frame, and then started to rebuild the house in its original configuration.

about 1 year into the business I was facing a decision, either go full scale and rebuild the business to increase revenue or sell.

I shot before photos on our fire rebuilds, but we have never shot before photos on any of our traditional rehabs. 

You should be looking for Building coverage based on the Replacment (rebuilding) cost of the structure.  

Unlike figuring the rebuilding cost of a free standing house, calculating the amount of coverage for the parts of a condo you own (sometimes refered to Improvements & Betterments or I&B's) is harder and may lead to quotes being all over the place.

Purchase price: $110,000 Cash invested: $20,000 Sale price: $185,000 Demolition of rear extension to floor slab, rebuild on same footprint, new kitchen, bathroom and cosmetics.

The potential tenants lost their home to a fire and so their insurance is footing the entire bill in addition to rebuilding their home.