I'm not expert, but I'm planning to do my first 1031 in six months, so I've been planning and doing my research like crazy. 

@Joe DaigleOMG over the past month their has been a ton of JUNK.

There are some exceptions, but they are rare, they have access to funds, and they typically built their empire when the timing was right and got lucky.Likewise, it's not often that you can buy a house and sell it for big money six months later.

Now it has long-term tenants in all four units that cashflow about $700/month.

This protects you if the tenant tries to tell you that he prepaid rent for the next 6 months or he had a huge deposit on file.

If he’s in a month to month simply non-renew immediately for August 1 and get on with it.

May want to look into NonQM loans, such as a profit and loss only loan, 12 month bank statement loan, or 1099 only loan if you have trouble showing income 

A FORMAL loan Mod done 9-16-2020 (But NOT recorded until 6-9-2022) reduced their rate to 3.375% to be REAMORTIZED over 360 Months.Looks like HUD took back a SUBORDINATE 2nd lien in the amount of $101,500 dated 9-16-2020 (Recorded 6-9-2022 at the same time as the Loan MOD was formally recorded)BUT they fell behind AGAIN so then another Loan Mod was done on 4-14-22 (recorded 7-15-2022) which reduced the Interest Rate lower to 3.125% to be REAMORIZED again over 360 Months.

If you know anything about building in Philly the plans and permits can be the hardest part of the project with it often taking many months to get everything in place just to be able to start construction.

My first rental tentent (none section 8) from the start never paid their rent ontime...and after 4 months I ended up getting them evicted.