Online! When people want something they rarely think about ads they’ve seen. They just google it. If you spend $50/mo you’ll start to be found on the internet in not too long (depending on where you live and how competitive the market is there). Options are Google adwords, being on paid directories, and paying someone (if you don’t have the time) to put you on free directories. There are many options, but the best bang for your buck is almost always online.