SOooooo that means telling multi-million/billion dollar entities "uh uhm, ah yes, we decided you no longer own those properties, yes those billions in mortgages you hold, GONE, please accept this "yah USA" lapel pin for your donation".

It is only a scan and a PIN but a bit of a hassle.So dig out your receipts from the past few months and try to enter them in the website.

Not to mention I was/am a highly experienced developer and not a rookie.If you were to hire your friend - the contractor to run the job for you and pay her the weekly fees/draws she wants and allow her to mark up the rehab by 20% or so, that would be fair and you keep 100% of the profits less your costs to hire your other friend the realtor who gets paid at acquisition for representing you at purchase and then again at exit (with the possibility of triple ending by finding the buyer too!).

Find a local attorney to draw you up a contract to use for every deal. 

Would the expense of under pinning with brick bring the value up enough to justify the cost? 

Generally, you want to maximize the latter for leverage but banks only cover ~60-70% of the total project costs and allow you to start drawing after construction has begun.

I'll go take measurements of a site and take mental notes and think I have a good gauge of a property but still find myself referring back to site pictures and written notes half a dozen times when doing as built drawings because there's a ton to remember.

When drawing up the PSA, do I need to put both tax lots in the legal description of the property, is it included, or do I need to make a separate PSA with the other tax lot?

You basically drop a pin on an address and the data it produces is on a radius around that (5-50 KM). 

Unless you are referring to a marketing plan that is meant to draw in people looking to sell to investors, aside from your real estate brokerage.