Your scenario is similar to how I ended up getting my Brompton (and other ensuing bikes). I had an event to attend in Prince Edward Island out on the east coast. The last time I was there was for our honeymoon, and we had brought our bikes, but didn't really get a chance to use them (nor was I really into cycling at the time). So, this time, given PEI's famous trails, I figured I'd rent a bike. Lo and behold... no bike rentals nearby where I was staying at all. Then I thought, what about folding bikes? I had heard about them, and so I started Googling, and then I ended up on this forum, looking at Bromptons, etc. and it was all downhill from there.

Whenever I go to conferences, if it looks like I will have at least one free day and if the location is known for its trails, I will try to bring my Brompton.

My advice is if you do end up buying, buy the most expensive folding bike that will meet your needs that your budget will allow. All things being equal, you get what you pay for.

Mind you, I want to see how the Helix turns out... https://www.youtube.com/watch?v=7OkPc0hD1S4