Then you can go out into that new market to determine what your VA entitlement can allow you to acquire ahead of your PCS/location change/assingment.Hope that helps address your lending portion of your question.

Have you lived in the current address for more than 2 years?

Once you have your cash buyer vetted and they’re qualified, and you’ve given them the address… do you negotiate at that point?

The thing is I don’t have their number or current address so I have no way of contacting them.

3) Are there other ways (online and free or for minimal amount) where I can find email IDs of motivated sellers rather than only addresses for sending the post cards (I know post cards work very well but just thinking if there is some other way)?

Honestly, I don't mind too much personally but it almost seems as if she's "moved in" and I don't want my guest to become a tenant.Still being new & unfamiliar with investing and house hacking in general, is this something I should address before it gets too out of hand?

this will also allow you time to  fix  or address any  issues that might come  up with the  process 

The homeowner's insurance is currently in my name/property address. 

How should I go about addressing this issue?

If you check out rentometer.com, you can plug in the address and # bedrooms and it'll give you a general range that would be reasonable in the area based on recent rentals.