Keep your cost of capital low as flips will take longer than you think initially and set aside 25% of your profits for taxes and unforeseen business expenses.

However, due to many unforeseen circumstances, money and the laborers who started but didn't do good work and it had to be done over ( etc.) the house is not sold yet even as of today.

The process can be stressful, as my imagination creates images of the tenant demolishing the rental before the eviction or the court delaying the case due to an unforeseen technicality.I've narrowed it down to best case and worst case scenario.Best case - the tenant vacates peacefully and the home is not damaged.Worst case - I have to give the tenant the home and the court orders me to become his butler for the many years. 

Costly factors when purchasing a  property, especially a buy and hold, are unforeseen costs, especially those that could have been avoided.

I'm not worried about backing out due to some unforeseen issues, since it is a condo there are fewer things to go wrong.

It may be that unforeseen things happen and you don't (can't) live up to her expectations.

A reduced exclusion is available to anyone who does not meet these requirements because of a change in place of employment, health or certain unforeseen circumstances.General CPAs usually fully understand the Section 121 exclusion since it isn't really a real estate investor specific rule as it generally applies to everyone.

Based only on the information provides I would say the answer is a big "depends".If the landlord is making genuine effort and has run into unforeseen problems he could justify the delays.

Lots of unforeseen issues that you and I probably shouldn't handle.  

He should be able to price the roof, with a caveat that framing or unforeseen will be above and beyond that price.