I'm experimenting in running some "adult" adverts on my pages to try and help with the cost of upkeep, but do you think they're too much, too intrusive?
I've come across Axsmar who are a German (one man?) company that make metal BDSM items - mainly collars, but also wrist/ankle bracelets and rings.
They custom make every collar and you can customise them - the permanent locking ones are interesting :) The titanium ones are fabulous - blindingly expensive!