If I was in your situation, the peace of mind would be worth it.

In check and gives you the peace to protect your family.

This will naturally involve expenses, but it could provide peace of mind and facilitate a swift restoration of your unit's functionality.

While I am sure they are a turn off to some people, they are fully disclosed and and worth the peace of mind to me. 

The brand brings tremendous peace of mind to sellers.And there is never a shortage of opportunity for anyone in the group.

After several months of paying a lawyer over $5K and a ruling from a Justice of the Peace I was to pay for their stuff including their legal fees of another $5K.  

I'm not the rich person who can face failure peacefully.

Also, as @Chris Pasternak (and probably others, long thread) noted, there are also intangibles such as peace of mind and flexibility that one could argue absorbs some opportunity cost.The calculus also involves other assumptions such as:- I have opportunities to invest capital - it does no good to pay interest on debt that you can't put to work- There are things that I must buy (such as an education or an economy car to commute to work) - some things need to be paid for one way or another- I will maintain reserves for living expenses - it is never a good idea to spend your last dollar, whether for an investment or for a purchase.- Investing and growing long-term wealth is important and worth the headache of making such calculations

Any peace of advice ?

This way the sister is invested in him leaving peacefully.