Here is my story.
A few months back I began to look into buying some adult cloth diapers, At first, it was looking dismal as I was only find sites like ebay where people were selling single All-in-one(AIO) diaper for 30-40 bucks. Then somehow I stumbled across a site called "Alibaba" and searched "Adult diapers". This site gave me a list of manufacturers that made cloth diapers and sold them for far cheaper than any ebay user, but being manufacturers they only sold in bulk. However, I simply looked for one with a low minimum order requirement and I found one that would accept a minimum order of 50 AIO diapers with inserts. In short I got 50 cloth AIO one size fits all diaper for about $400 USD from China shipping included in about 2 weeks. I only use 12 out of those 50, the rest I've been selling on Ebay. That may seem like a loth of money but you'll save in the long run.
Keeping them clean is easy also(for me anyways) Since I only use them for wetting, after I use them I leave them in the bathtub until I go to shower (don't act like that's so gross..you know you pee in the shower). When I go to shower I let the shower water run through them (the same shower water that I'm using to wash with at the time) to dilute any excess urine. Then I simply squeeze and repeat ( if you're squeamish about handling your own urine then you probably should find another fetish) until I'm finish showering, by the time I'm done they're nearly clean enough to wear again-but not quite-I then place keep the used and rinse ones in a tough duffel bag, which is then place inside of a large tupperware-type lock-lid container until washing. When I was I just wash them with the rest of my clothes and Items (Though its best if you use a cycle that will be cold-wash/hot-rinse. )
This has worked for me repeatedly without a problem yet.