Give them a 60-day notice, then charge them a prorated rent for the additional 20-day extension.

Additionally, there typically are additional state protections (outside of the agreement) based on where the fund is located.

That leaves an additional market demand of 780 units.

FlashlightTape measure/Laser measurePaper/Pen/iPadBinocularsReceptacle testerLevelMarbleDroneRespirator/Face Mask/Eye Protection/GlovesAQI testerWater pressure gaugeThermal cameraEndoscope cameraKnife Good list, in addition in my truck; ohm meter, megger, magnehelic, steel ball, air compressor  generator, plus stuff I'm forgetting

In addition, the gas bills have shut off notices and are not being paid. (3 units are occupied and utilities are all paid by owner).

Reach out using the message system if you have any direct questions or want additional advice.  

Quote from @Victor Yang:In addition, is it possible for me and my wife to gift 36k worth of equity per year of the house (under the annual exclusion limit) and therefore have none of the costs go towards the lifetime gift limit?

Just one additional option.  

In my experience in MO, land bank properties are very low priced (these are generally properties/parcels that weren't sold at the tax auction), but they often have significant tax liens on them that must be cleared in addition to the "sale price" AND they require a significant amount of rehab in order for the properties to be inhabitable. 

Most look at a Certificate of Insurance and confirm coverage limits but best practices are to (1) become added as additional insured under contractors policy and (2) understand coverage exclusions which are not going to be detailed on an insurance certificate.