You could just buy one and resell it as long as you buy one at a decent price.
But I would first ask if you have tried a rangfinder of any brand. If not, why not get something reasonably priced like a Fed and a cheap lens. As long as it works for a few months then you'll know you actually want a rf at all.
If you like the shooting style, maybe then its worth dropping thousands on a Leica. If not, you can resell the Fed, buy some more film and shoot with what you like.
sent from phone. excuse my typing.