Executory contracts include any transaction that defers some action by either party that pertains to ownership or possession of real property into the future.

I also don't really know how to structure the agreement so we are both able to have our names on the home besides buying through an LLC which requires cash payment neither party has. 

He demands we revoke the eviction in writing and agree never to raise his rent within 7 days or he is sending the videos to all these people and giving them to "other interested parties" so they can file their own complaints.

It is like the old kids game "telephone", when a message is passed from party to party to party, the message starts to change.  

Once the Certificate of title (in FL) or Sheriff's Deed or Trustee's Deed (name depending on state) is recorded and the parties of interest (lien holders) are notified, you will be on the hook. 

Anyone that takes 3rd party info for face value and doesn't do their own due diligence is crazy. 

Disclosure: I am a real estate agent:  To reiterate what has been said already, it costs you nothing to have a buyers agent represent you, since the selling party pays all commissions. 

I tried doing a rent to buy at my current condo but the lady who owns it won't even talk to me since the management of the property is through another 3rd person party.

Maximum Basic Standard FinancingSingle - $271,050Duplex - $347,000Triplex - $419,425Fourplex - $521,250FHA Basic High Cost area limits are:Single - $625,500Duplex - $800,775Triplex - $967,950Fourplex - $1,202,925Here is a site to look up Maximum financing with FHA;https://entp.hud.gov/idapp/html/hicostlook.cfmMaximum Financed Properties The maximum of four financed properties includes the subject property.Inducements to Purchase Certain expenses, paid by the seller and/or another interested third party, on behalf of the borrower, are considered “inducements to purchase” and result in a dollar for dollar reduction to the lesser of the sales price or appraised value of the property before applying the appropriate LTV factor.

The representation has to be crystal clear (none) and additional documentation needs to be drawn up to document understanding by all parties.