I think the Roam 1 might be a very good choice. If you search diligently on eBay and CL you might get lucky. But if you want to get started, and you have the money, it might be better to just get the bike. I'll bet that bike would serve you well for many miles. The gearing is pretty much what I have on my old Peugeot, and the wheels have 32 spokes, which should support your weight without difficulty.