I'm wondering how much specifics I need to include for each line item. 

I’ve been down that road of carrying a line of credit on a property before, and the stress can realy pile on when you’re staring at that monthly interest.

What do you do when in house goes on vacation? 

Are Days on market shortening or stretching out in the neighborhood.

I have 8 buildings with possibly 9 lines that I would like to get a package deal on sewer scopes of all the lines.

You can read a book and multiple books, but unless you are out there doing it (I.e. getting bids and getting contractors to truly get you an exact estimate) you will be far off from the numbers you want and may even lose money on the flip/rehab.The best advice I would suggest in my experience is that you should get into the line of work by either partnering with someone or working with someone on some projects prior to going into a flip on your own.

We Normally put steel posts nearby so no one runs into them.In the third picture one unit is just in front of the picture, then a second unit is at the far end on a post.These can be set off by deep fog, rain or sleet. 

Also would you focus on a specific target market you are familiar with and know the comps like the back of your hand and have boots on the ground ?

Than I thought it was all the things that could go wrong in the flip, hidden gems like K&T hidden in the walls, shot main-lines, etc.....   

If you ask the manager to justify a fee and he starts hemming and hawing, move on or require them to remove the fee.