I'm about to put in a patio garden. I live in a townhouse. If I put a
composter in the small space I've got, will this be a disease source for
the plants I'll have there? What do I do with the "tea" from the bottom
of the composter? If it stinks, I'm sure my neighbors won't want me to
let it drain into our common slab.

What is a good, self-contained composting unit that I can use on a
concrete slab?