You do need to use anti-spam tech to not hey blocked though.

Since he was 6 months late on the loan, I had urgent needs for the loan and wanted a wire for many reasons (my bank- bank of America puts holds on all large checks, so I am blocked from access to it for a week) and I didn't trust him with my wire information as he told me point blank "I'm not going to give you that information" when I asked who the closing attorney was. 

What's the best way to block this thing up so they can't come in?

Either way you've well earned my block and oblivion in my world.

Lot and block is a little easier although in my Land And Timber days it was not uncommon to run a Blaze line come up to a usgs quarter or section monument then have a survey 10 feet away.. makes a big difference when your logging. 

Once or twice a year, a week should be blocked off the property, and maintenance included touch up painting should be done.

These could be beautiful properties that add to their blocks rather than detract but I need to take the opportunity myself, it's not going to fall out of the sky. 

I'm looking at a place like 2.5 blocks from it.

Look for cross or blocking on the joists for earthquake and general stability. 

Detroit is a block by block city.