If you had a mold remediation company do all the work and mitigation, send the threatening party the reports and clearance.

@Richard Benjamin Wilhite, @Bill B.makes some good points about loan terms and the strict identification rules for a 1031 exchange.I would add from a tax mitigation perspective that buying the largest property possible will give you the greatest amount of cost segregation possibility and at the lowest cost since it would be one study rather than several. 

We already signed the purchase agreement several months ago...it has been on hold while they mitigated a pest control issue that has taken 2 months.If it's that important, make it part of your purchase agreement.

How to mitigate unexpecting costs that come up, is a battle that happens on every deal, but how we handle it is to keep the reps up.

This approach can help mitigate losses by increasing your margins.

A word of caution - this is a short term solution to mitigate the credit card load.

., mitigating tax liability for passive and non-passive income).

Great points from @Doug Smith and some I will be leveraging in my own work.We do some "pitching" of startups to landlords and while not a 1:1 comparison we generally also leverage the credibility of the team or consultants that the startup is using to mitigate their risk. 

From a lender's perspective, separating personal and business credit is critical for scaling operations while mitigating personal financial risks.

Some sponsors tried to mitigate the risk with interest rate caps but these can't handle unlimited rate rises, and some found that their strategy blew up on them.