Even if they are to break up, dad is on the lease and probably won't want his credit ruined, so he wont miss the payment or he will make her find a roommate to make they payment.

So, we had to have them dig up the sewer line at the point of where the clog was and physically remove the toys (an industrial strength snake was attempted first but could not break up the toys so they would pass).

Every barrier to entry government creates assists the behemoth companies they refuse to break up. 

If the cost is way more to break up the tiles then perhaps changing out the cabinetry and adding the Quartz after would be better route?

Perhaps you can get some concessions from this tenant, including a break-up fee.  

I find whenever a tenant has a big life changing event (job loss, breakup, death in the family, etc.) and can not meet the obligations of the the rental agreement, I need to meet with them right away.

Many times I break up the trip and sleep overnight by a friend, technically I'm in route so is the nights sleep considered time in real estate.Another example writting this post or going to the bank to deposit cash.What counts towards those 750 hours?

What is a fair break up of wholesaling responsibilities.

This is more efficient for them, but I prefer to pay on or about the first of every month, to break up the bill of having 1,000 gallons delivered at a time, lol.

Your lease has both names, and that means they are both fully responsible for rent regardless of their break up.