As an idea or suggestion, find a bare bones cruiser frame. Older ones in "patina'd" shape can be found very cheaply (sometimes free). Go to the local metal recyclers, find a pair of alloy rims, lace in hub of choice, put on cog of choice and fit chain. If there are tires with the rims, so much the better. This is my wifes 24 inch Schwinn that was assembled from parts found, given or purchased used. Could not find alloy rims in 24 inch here, so used steel ones I had on hand. Bike was taken to the salt mine in Hutchinson for the second "Tour de Salt." Bike was gutted, rinsed and rebuilt afterward, but the rims still began to rust. I will eventually have to replace them, but the bike in the single speed state cost less than $100. With using an older frame, at least you won't have to worry about welds being bad.
