If so, how do you do check this quickly (best way I found is Google Map)?

If one is going to be generating leads having a RE license seems like a great option to offer people if they don't need to sell for quick cash.

He let someone he trusted move in next door without a lease as that person does work around the property for him, and that person let someone else come in and had a quickly broken relationship with second person, and that second person let a third person come in with a new relationship with second person.

I think there is tremendous growth in this whole area and builders can't put new inventory on the market quick enough. 

Quick question,So I usually calculate 3% in my deals analysis for closing costs.

Quick sale like 30 day vs 90-120 day regular(US) value.

We aren’t looking for any get rich quick ideas, but more for the ability to add significant stability to our lives within the next several years, including rehab/flips and buy and holds.

Hey quick question, does anyone know where I can get more info on refinancing?

Like already stated in the thread address tenant concerns quickly, and once they leave fill the vacancy quickly- If there is work to be done, you can make it a "live in flip" and start doing changes your unit. 

If they are professional, they can explain this quickly and easily.