The reason I'm aiming to scale with wraps is because the reserves needed to responsibly maintain a long term hold, combined with the headache of managing, make it not compatible with my goals. 

If not, how do people resolve situations like this?

The problem that I am seeking to resolve is if the buyer only wants to pay all cash----doesn’t want to do a seller finance---is there any way around this problem?

Like being able to walk into my bank to resolve any issues. 

I'd follow up any conversation with an email or written letter summarizing the interaction, some written proof of the dispute and attempts to resolve it in case they do file a lien. 

You need to assume that at some point you will end up fighting in court and the documents you create before starting the partnership are the ones the judge will use to resolve the partnership. 

We operate in Oklahoma, so the service would need to be compatible with our area. 

I think what Thomas is saying is that resolving it as soon as possible makes the most sense so that if your sister wants the money at whatever point, and you are not in a position to pay it (knee deep in the rehab, or whatever), then it could cause an issue.

I can then include that inspection report in my Scope of Work that I provide to my contractor so they can include those repairs in their proposal.When I go to sell the property, we should have all (or most) of the code issues resolved, which prevents my contractor from hitting me with a change order to fix the inspection repairs.  

Here is a note we bought for X, paid Y to resolve it, and collected Z when all was said and done.