I also like having more control over payment processing to weed out the fraudulent charges.

There is alot of liquidity in the market presently but it will dry up especially when interest rates rise to combat inflation.

As it is, most major Canadian financial institutions - RBC, TD, BMO - are predicting a period of lower housing price increases with stricter lending and rising interest rates to combat the runaway housing prices.From personal experience, I can tell you that as a Canadian investing in the US is not that hard.

Our relationship at that point had devolved to a point where I could no longer have a tenant that was not only contributing to further damage of the unit but were downright combative.

Maybe the prior owner was a 100% wounded vet (I believe many municipalities will basically zero out the property taxes for a 100% combat wounded vet).Also, where are you investing/looking? 

You are entering a legal contract when you write an offer and not being able to close means you have entered the contract fraudulently.

Using a fraudulent POF is considered an attempt to commit financial fraud and you can be prosecuted if the agent contacts the authorities.

Any suggestions on how to combat it?

This last time, she paid the rent by the due date, however Apartments.com noted to me that they would debit the money out of my bank since the tenant requested it was a fraudulent transaction.   

You criticize because you lack the ability to combat with words and ideas.