Agreed
You clearly did, and you did an awesome job.
You have a good grasp, just a few minor details
Yep, with social engineering it is far easier for you to “sell your story” in person, and its far easier for them to turn you down via phonecall or via messaging.
Not to say it cant be done remotely, but just easier in person.
Arm youself with knowledge, which you seem to be quite adept at doing.
Heres some more info for you and your potential installer that may be of use
Watch Installation procedure Guide 1
Watch Installation Procedure Guide 2
Watch Needle insertion angle
Im assuming VA is Virginia, so south of Pensylvania.?
Not sure if thats too far for you.
I know where most of your states are but the scale of distance throws me…
Philly is just up the road a little way isn’t it?
Out your driveway and turn left…
Brian Decker in Brooklyn, (no contact details, but he does come highly recommended)
if thats easier for you to fly to NY 
Anyway, hope that helps
Non American with Non American geographical knowledge shutting up now