Can we duplex up to remove the back porch stair and call the basement a future apartment without going the "deconversion" fee ( $15,000) and future tax disadvantages? 

Around $200 for waste removal and $40-75 for electricity for the well per month.

I’d recommend automating those first, even if you start small, then refine the percentages as you get historical data.It’s less about the exact system and more about removing temptation to spend what should be reserved.

How they are removed, what will happen if a decision is not unanimous. 

When you remove taxes and insurance, which runs a couple hundred dollars plus PMI because they put less than 20% down, the principal & Interest payment is somewhere in the $1,400 a month arena.

By the way placing posts removing old posts and replacing with a new post) is costly and typically most posts have many years left.  

They already expected to have to remove all the carpet in the initial quote. 

@Greg Scott Not in California but what we have done is an addendum removing the old roommate and adding the new one that is the sole term of the addendum and everyone signs including the leaving roommate. 

On the flip side, I've seen controversial comments that are related to politics not get removed Here are my controversial comments "Pizza Hut is better than Domino's"  and "Coca Cola is better than Pepsi" hahahaPosts that meet certain criteria are edited or deleted as necessary.

The right planning can help, but a straight 1031 won’t remove the inheritance tax obligation.