In these cases I would probably not pursue an eviction or attempt to ruin that tenants credit history or make their life difficult...too much time wasted...but at least when the BPO is done...the agent will note that there are non paying tenants in the house...who probably didn't grant access...therefore who knows what the interior will look like...result being a lower offer and a better short sale negotation.

She had a renter who ruined carpet and kitchen linolum.

She's bat sh*t crazy and wants to ruin your life.

You are probably ruining it for others if you feel that you are taking advantage of others.

If you are talking about gable vents, that has no bearing on the roof installation, but lack of proper ventilation will ruin a roof and any reputable roofing contractor will not install/warranty a roof without proper ventilation. 

Bigger Pockets was one of the first resources recommended to me, and it's been a gigantic help.By way of background, we reside in Orange County, CA, and just within the last several months finally emerged from the smoking ruin of the Great Recession.

It will save you from getting into another deal with your expected profits and then facing financial ruin when they don't show up on time.

Needless to say, the book did not do a very good job explaining how that can ruin a good deal.Lets say I bought a triplex to house hack in and the purchase price was 300k.

And that's in addition to them letting the FHA or VA loan approval lapse for the condo complex, ruining your chance of selling easily and driving prices down.   

I 1000% know that no matter how much information I have learned, what I still do not know could possibly ruin me.