I would personally move forward and not think about it again until someone filed something or sent a letter or reached out.

If it is brick, it may need to be raised/shored, and have a block foundation to restrengthen.

It was an older woman screaming that I must stop sending her letters and stop driving by her house and no her house is not for sale.

A cover letter will not do much for you.

Long story short, some friends of mine were looking to get a group of investors together to purchase a block of one bedroom units in the Houston, TX area for a buy and hold renting situation.

My recommendation would be for the homeowner to send the "roommate" a certified letter advising that the property has been sold and that she must vacate on or before (date). 

I got 3 houses on the same block with 12 combined beds. 

If you block their phone numbers that may do it. 

The PMs are not a big deal...you can just ignore or block them.The constant cut and paste hidden advertisements are problematic...on some posts, every reply is an ad.The luring of members to PMs that are actually sales pitches are fine because they reveal who not to partner with.The lies about investment performance are bad.The moderators have their hands full. 

Hot market in Clarksville (a block off W 6th street in Austin Tx) How did you find this deal and how did you negotiate it?