I have a great broker for single family homes and first time buyers or people with 2 properties.But I am looking for a broker who can help get things done for those who own multiple properties and want to grow their portfolio.

Not to mention, if you were to close on an investment property you could basically pay yourself the buyers agent commission. 

We used the standard form "Addendum for sale of other property by buyer".

The neighborhood is pleasant, except we have a next door home wherein 2-3 families are living in , the property is unkempt to say the least, usually someone is arguing and or fighting in the home, place reeks of marijuana and they have 3-4 dogs and 1 of the dogs they can't really control.Not sure if I'm being too overly cautious but I feel I can't in good conscience rent my home to another family knowing all I know with the nextdoor neighbor.Should I start from scratch and sell the house and buy a new property or keep and rent the house and buy a new property?

You'll be paying at least 5-6% not the 2.5% you have on your sheet (unless you are an agent also and will only have to pay the buyers agent)Again...bottom line not enough details here...you chould make $35k or you could lose $15k with these number.

The market helped, but if I would of waited the properties would of gone to another buyer paying more....plus brokers love me because I actually perform quickly...leading to more and more deals.

Unless Dad transferred ownership before passing, the heirs (who might not be who you think they are) will have to get a license to sell from the probate court.I recently helped a buyer with a property that they really wanted. 

I want to vet and qualify them  as well.Sometimes it's better for me to say NO to a passive investor or a direct buyer wanting to be my client if our goals do not line up.  

I've never had an issue finding a buyer for a property when your terms are good.

Initial cost is driven by home buyers making it too high and rent is rarely sufficient to cover expences.