We will likely lose this dispute.  

You are going to lose this game.

We were afraid we would lose these tenants when we bought the property so we offered to have them sign a new lease and they will be staying until at least April 1st 2023.

Do they have money in escrow being held back that they would lose if they are not out?

A retention wall alone would be about 20K and it's needed as we are losing land due to erosion. 

After losing out of a few offers in a super competitive KC market, a house that had been pending came back on.

That's because the caps on annual depreciation and expensing deductions for passenger automobiles don't apply to trucks or vans (and that includes SUVs) that are rated at more than 6,000 pounds gross (loaded) vehicle weight.SUV’s with an UNLOADED gross vehicle weight greater than 6,000 pounds but less than 14,000 pounds are allowed to claim a Section 179 expense of up to $26,200.Trucks with an interior bed-length of six feet or more are NOT subject to this $26,200 limit.Trucks over 6,000 pounds UNLOADED gross vehicle weight with beds shorter than six feet are considered SUVs and subject to the $26,200 limit.Trucks, vans, and SUVs with a LOADED gross vehicle weight of over 6,000 pounds are NOT subject to the Section 280F limits.

We were afraid we would lose these tenants when we bought the property so we offered to have them sign a new lease and they will be staying until at least April 1st 2023.

There's a fable about a pound and an ounce somewhere in all this.

I don’t want to lose by due diligence money and pay for an appraisal just to have the financing fall through.