Pretend your getting the hardest rain you have ever seen and imagine where the water is going.I would also keep an eye out for sewer lines and type of material.

When I first got started I didn't officially join any coaching programs, but I did buy the materials at mobile home university.

I individually priced all my materials and got several estimates from contractors.

I have been consuming as much education/reading regarding out of state investing as I can as well as literature regarding buying larger buildings (not quite the syndication level) although I have been reading that material as well to digest.

The place where you can add value with no money is a situation like: you find project A, it is a 120k purchase and it should need 80k rehab but you can get rehab done for 65k cause you can do some of the work and you know how to save on materials and you can manage the rehab. 

Common fees will include a set-up fee, a leasing fee for each turnover or a lease renewal fee, marking up maintenance, retaining late fees, and more.

(Currently our rebar supplier is behind 2+ weeks and these materials were ordered 45 days in advance). 

That is true with almost any material item.

Quote from @V.G Jason: BP agents are gutter material.

I have spreadsheets filled with material lists for every phase of the build that includes pricing for materials as well as labor, and sources that I use for them.