I am currently paying additional principal ($4000-5000 per month) spread out to most of the properties but was wondering if it will be better to apply all of the additional payments to one of the house pay it off and then move to another house?

Most asbestos harm came from mining the product for years or installing it for years in a poorly ventilated area like in ships. 

Good morning,I am adding my PM to the insurance policy as "additionally insured".

Doesn't harm him.

Part time realtors and part time lenders especially tend to do more harm than good because they have no idea what they are doing. 

I will try them both and see which one works best. lol No harm in trying. 

In instances like that where servicing is straight forward, I see no harm in getting the best terms on price and leverage.

As an additional note to my reply on this, it's situations just like this why I prefer Contract For Deed over Lease With Option. 

It’s a real problem that’s harmful to many new investors.  

There is no harm in buying a $500 to $2,000 course if you can afford it.