Heh, I do that all the time. Ok, well, not all the time, but usually once or twice a month with someone who's interested, but not yet "sold" enough to pull the trigger. Usually meet them at a local studio or rehearsal space, take my setup and ask them to bring their guitar. This usually lasts anywhere from an hour to 3 hours (longest one, though it felt like it went by much faster).
Also, someone did exactly this for me when I was thinking about buying my first, too. I went to their house, sat and played with it for about an hour while they manned Axe-Edit in front of me. After that, they played some guitar through it as well, and played some recordings they did. A week or so later and I had my own.
I realize it's not exactly ordinary, but I love seeing peoples faces go from "Ok, I'll give it a shot but I'm happy with my setup" to "Oh, wow, I need this". Mostly bass players, as that is the scene I'm tapped into, but a handful of guitarists as well. In fact, this has become such a common thing, one of the studios here is working with me on setting up "Modeler Day", which will be an open event so people can come try these out, too.
Wish I were closer to you, OP - I'd gladly lend you a hand. Hit up SoundCloud and YouTube, but realize that both of those platforms won't sound as good (for anything, guitar, pickups, effect pedals, amps...) as it would standing there in person. But it should give you plenty to think about. Also, no matter what your financial hit should be minimal, thanks to the 15 day trial period (or, if you buy used, you should be able to sell for very close to what you pay for one).
