My job has steady income, but no W2s and no pay stubs.

I would keep the deposit unless I am able to rebook the dates and then I would only make her pay the difference for any unbooked nights. 

From a risk point of view, there is no real middle class and a very small upper class.

Consider getting a statement signed by all parties which states that everyone has agreed to terminate the current lease early on X date and all obligations by all parties have been paid in full and that the deposit will be kept by the landlord and will be applied to the new lease. 

When I made my earnest money deposit, in Oct, I was told production would be in 2022 and completed by 2023.

Having watched many prior co-workers get paid, cash their check at the casino, and promptly deposit it all into a slot machine I can tell you with pretty good certainty that casinos don't have a positive effect on disposable income and good use of the existing income in the area surrounding :)Are there solid local employers OTHER than the casino in a 15-minute drive? 

My property is in a LLC with no mortgage.

The vast majority of lawsuits against Landlords are for wrongful eviction, security deposit disputes, and Fair Housing Violations.

Drop price $50 or $100 Wait 2-3 weeks and if no renter emerges drop it another $50-$100.

If they have no assets or if you don't have verifiable proof a lawsuit is worthless.