There's ways out there to best guestimate repair costs to get close as possible and there's also an option to have a contractor give me their professional estimate.

Hiring professional property management, in my opinion, could go either way for you.

A good real estate CPA will know how to manage the relationships between the various financial and legal professionals you work with.Best of luck!

We stopped at several open houses and had an opportunity to chat with real estate professionals there.

The needs of real estate investors are very different from the needs of "normal" insurance clients who just live in a house they own, and drive a few cars.PLEASE, for your sake and the local market as a whole, only work with insurance professionals who can demonstrate a deep and thorough understanding of your needs as a real estate investor. 

Our properties are completely renovated, have qualified tenants in place paying top market rents and are professionally managed by one our trusting partners.

This isn't something I would leave to Bigger Pockets forums the laws vary widely by state so it would probably be best to look up the law or talk to a professional in your area, (not over the internet) who knows what they are talking about.

I didn't stick around but I saw the video from the day before. 

The first is that I came across a few websites and YouTube videos that suggested in a quit claim deed a mortgage doesn't transfer from seller to buyer - is this true or false?

@Dan Handford@Jeff KehlThese are in depth questions that you can't get from watching Youtube videos.