2) What additional cost will be endured by me when forcing tenants out early?

Neither of these arguments carry any weight in this context when you compare it to what certain tenants have had to endure.  

Hoping you didn't have to endure too much hassle for your properties there!

To be able to continue through many different stages the real estate markets had endured over four decades is incredible.

You don’t want to endure the delays of a winter sale.

And frankly, knowledge is only one piece of the "puzzle", the main component is rather the personality - endurance threshold, confidence level, risk tolerance, common sense, persistence and resilience.  

Pit bulls were bred by changing mytochondria to get dna that can endure pain, and horriblest ways imaginable.

I have had to endure many headaches with entitled tenants (2 properties with inherited tenants) who feel they are more owners than I.

Gotta love it if you are going to endure this phase.If you want to construct, then skip college and join a good construction company.

I cannot endure month by month agony (losing money) just with the hope of appreciation - I'm too cheap for that.