We lived in the property for 2 years and rented for 2 years to tenants, so by selling now, we ensured that we could avoid capital gains taxes.

What can I do to ensure there are no surprises after closing and avoid a costly eviction? 

LLC, S-Corp, etc), to file their BOI Reports by the end of the year to avoid being penalized up to $10,000 per entity. 

An uncontested foreclosure is often the best way to resolve issues with subordinate lien holders though I've also contacted some and explained they were about to be named in a foreclosure and suggested that could be avoided if they just released the property from their judgment/lien.

And what’s one mistake you’d tell someone new to avoid?

This coming year set the goal of getting more committed to learn and expand my knowledge to avoid previous mistakes taken as well as to be able to effectively continue to expand my portfolio.I’m here to connect with others who are also passionate about real estate, and I’m eager to learn from your experiences, insights, and advice.

He said he took a helicopter on vacation to avoid "unwashed people".

He will however be the first to counsel others to avoid anyone found to be unscrupulous after ALL of the facts come out and that usually takes time. 

Either way if it helps someone out especially going through what he mentioned it may add some gratitude and help him avoid further late bills.You can get more bee's with honey so in some cases it can pay off being a little more lenient. 

They like extra room to avoid accidents, etc....Just my $0.02....