I'm in a bit of an compromised situation, as "life" requires me to move to the DFW area before August.

Your current tenant was trained to take advantage of you by how you compromised repeatedly on situations that you didn't have to.

I recently maxed out on I-bonds, which seems to be a reasonable compromise between staying somewhat liquid and letting your cash pile be decimated by inflation. 

I appreciate the opportunities and wouldn't do anything to compromise the relationships built.

Trying to work this out between the tenant right now and offer cash for keys so I hope we can come to a compromise without going the eviction route 

Ive had some where we compromised and I got to inspect once we were under contract and my option money was the amount of one months rent in case tenant didnt pay.There are creative solutions to your problem.

So as a compromise we discussed adding a requirement in the next lease that the tenant pay a monthly fee to cover the cost of a professional landscaper 

Assuming $850 is market rate, or maybe even slightly below, the $750 tenant is paying almost 15% below market rates.If longevity is worthwhile to you, you could always offer the longer tenant a compromise - somewhat higher rent or they'll have to move out because they're too far below market rates.

Also if you aren’t looking at at least a 7 year arm can compromise buying power because 5 year arm tou have to qualify at a rate above note rate

In other words, I reminded them they are still $200 below market rents and that if they chose to move out, I would miss them, but the unit would be listed at $2400 for the next occupants - so they were getting a deal and I WAS sacrificing and compromising to keep them as great tenants.