What are your typical min and max values, and required resolution?
In similar applications (before retirement), I often used an analog voltmeter with a “recorder” analog output at the test point, driving a long cable to a remote voltmeter (analog or digital).
For this particular application, I'm typically running 1.50-4.00 volts DC. Hundredths of a volt resolution is plenty for this. Running out tenths gets 90% of the way, and going down in to the hundredths is that last bit of fine tuning I like to be able to call the job "done right".
In general, running to 20V DC would be good for some other projects, ideally up to 120V AC/DC, but it's not an absolute requirement.
Before realizing I could Skype myself, I had been using a long spool of CAT5 cable that I rigged up to be able to plug in to my Fluke 77, which worked well enough, but not the most convenient to work with. It recently occurred to me that I could simply just pick up a set of 10 foot long multimeter leads, and still set all this up on the ground, avoiding the ladder/table use, but it's still a bit of a pain to set it all up.
I've also been considering picking up one of the Pokit meter kits, then simply sharing the screen of the phone rather than using the camera to view the Fluke, but that is still dependent on having internet service, which I don't always have at some of my remote sites.
I realize there's a multitude of ways to "make it work", but I just hoping to be able to find something that's set up to do this already out of the box, and better than a home brew hack job, like I'm doing now.