AFAIK, those codes don’t need to be kept private, but I think they only do that verification once, so you can probably just delete the file at this point. (After all, you can also use a TXT record to store the verification code for a domain with Google, and those are definitely not private; anyone can dig your domain’s TXT records.)
Not in the US.
I’d be careful of making sweeping statements about 3.7m square miles of land from your doorstep in LA.
I’m in the US too, and here in Atlanta I use Organic Maps frequently to find specific street addresses. It works quite well. I would agree with the other responses here suggesting that maybe you could contribute some data to OSM for the areas you encounter that are missing street numbers. You’ll be helping yourself and others!
Alternatively, you could pay money for a solution from a reputable company with support.
and run the possibly even greater risk that it’ll fuck something up, since you probably can’t even look at their source
KDE Connect should fit the bill; despite the name, you don’t need to be using KDE (or Linux even) since there are clients for every major OS, even mobile.
Among many other cool features, it lets you easily and simply just send a file from one device directly to another on your local network. I use it all the time to send photos from my phone to my desktop without plugging anything in, for example.