For instance, if all apartments in your market are using granite countertops and vinyl flooring, you don't want to install marble countertops and brand new hardwood floors. 

It's a concrete slab for most of the basement but there is an appeox 300 sq ft addition where a 1f bedroom is that is built over a crawlspace but also with field stones for the foundation walls . 

If the sewer is deep or a concrete street needs replacement then double it. 

We added a huge 30 X 30 deck, 2 garages, 3rd floor to the entire property.

I’ve also run into scenarios where I have questions but I don’t know who to ask, or I get not-concrete responses on BP.

You'll see the numbers right in front of you, so you have something concrete to go off of rather than guessing.

No only will you be updating4 bathrooms (4 x $5k = $20k)  and 4 kitchens (4 x %10k = $40k), you likely will be updating electrical and water and HVAC, maybe the roof and floors too. 

I recently purchased a duplex in Columbus, Ohio, and wanted some advice on the floor plan of this full rehab.

I need help structuring a sub to dealARV 600kowe:280Ksec mortgage 30k1st floor pays:1400mortgage 2200What can I offer this legally married couple, divorce not finalized, one party wants 150k

Rehabbed most of the units with paint, cabinets, flooring, etc.