I feel like I have spent an eternity reading, researching, listening to the BiggerPockets pod casts, etc...  

tenants they are slippery cast of characters at least the ones that are lifers.. :)   

Identify a 3rd party now, that both respect, to cast the deciding vote. 

You will find resources here from blogs to pod casts and forums.

You will find resources here from blogs to pod casts and forums.

@Matthew Anderson - glad to hear- I have been listening to a lot of the pod casts to soak in as much information as possible.

You have cast a very broad net.  

Drain line.. is it the old cast iron and look crummy or is that good?

When the home inspection was done, there were big ticket items that needed work: needs new HVAC, new roof, excavate eroded and leaking sewer made of cast iron, install new sump pump.  

2 weeksThat's from the movie Money Pit - you will not get an answer to your question that will encompass every flip, it all depends on what you do and how much you do, I'm a General Contractor and i can give you at least 20 different prices for the same project -  lets say, a bathroom ( most common reno ) -size of bath -  what tub, (steel, cast iron, fiberglass) - or is the bath just a shower, (fiberglass, ceramic tile, marble, are there accent pieces ?)