Travelling alone isn't crazy at all, in fact I'll probably do it once I have the funds/get an idea of where I want to go - always wanted to go to Tokyo and work my way around Asia from there, do NY to LA, or maybe even book a ticket on the Trans Siberian railway.
For those considering France, remember that laws concerning photography in public are very different to over here (i.e far more strict). Not major concern if you're mostly doing architecture stuff, but if you want to do more street work you have to be careful. Kinda sad when you consider that France was the home of many very famous street photographers.