I am interested in utilizing space again for group meetings, workshops, and for clients who may still desire private space.  

These boxes are sold on Amazon, and I can pay to have them shipped to him.

Keep in mind with a 1031 exchange, it's important to ensure that the total value of the replacement property is equal to or greater than the property you sold.

I have access to a huge community of real estate investors, private money lenders, ect.

Instead, start by sharing why you’re interested and ask questions to understand the seller’s motivation like, ‘Why do you think it hasn’t sold yet?’

WE are seeing this in the Portland market.Montgomery Park the largest office complex in the state that sold about 7 years ago for 250 mil just got bought ( after no one bid it at foreclosure) for 25 mil by Menashe family. its over 1 million sq ft.. dont think you can lose on something like that. reminds me of the buys in 2010 in some markets were sfr's were selling for 1/4 of replacement costs..

When the house eventually sold, I contacted the buyers agent and explained it to him so he could be the hero with his clients and show them how they could save a bundle on their property taxes by appealing and getting that corrected!

I even sold my townhouse rental  just like you sold your 4-plex to keep the process going.

Of course a visit to the county records office and -correct reading of the legal description would reveal that the tennis court lot was the one being sold.  

For example, if we sold the property for the asking price that it is now, $459,900, you would get $275,940+$41,315 (profit accured from 15 years)= $317,255!