I currently pay my bills via my handyman business "Handy Hank's" - I work for a lot of property management companies and have witnessed the high potential in real estate investing. 

Have a face to face, with a witness present and follow up with a letter.

It's quite likely that you are witnessing the side-effects of large private equity firms working in your markets buying up large quantities of rental homes.

I collected a deposit, He is not allowed to rekey the doors, I have an eye witness that he packed up a moving truck and left. 

You could always have a witness there besides you and the contractor, plus the video.

It is during the MOVING PHASE, that you must be cool, have all your wits about you and be prepared, yet still be cordial so as not to enraged the monster that seems to be lurking in your Tenant during the MOVING PHASE (as there is NO ANTIDOTE to calm the savage beast once it takes form).

i have a property on my hands wit a 84K mortgage and market value is about 125-130k...what can i do with this property?

Witnesses testify and the judge rules.

I've witnessed that some motivated sellers get extra motivated when their buyer is likable and as pretty a lady as you are. 

As you already witnessed most of them are geared to get you to sign up for a longer seminar to pay for their membership.