I'm glad you found it helpful. We've tried so many things, I don't know where to start. From flyering, to direct mail, to Craigslist and other sites.

Balancing the chicken and egg is definitely a big challenge. My advice to you is if you can find one side of the market easier to attract then initially focus on that. If you're just starting you'll need to figure out how to get supply (or hack supply). Then spend time on getting demand. Then, repeat.