Here's a recommendation from a male eyelash technician; use Group On, Social Living and Craigslist; hair, nail, spa, tanning and beauty salons; my most successful client source is our website. My service provider is Yahoo for small business, it's affordable and easy to create your website. You will not be successful if you do not have a website, plus an impressive business cards. Make a habit to visit 2 salons everyday and offer special price to receptionists and stylist; it will take 5-6 visits with the same salon before they remember you and what you do! Above all, pray and ask for divine help.
Lastly, you need to pick-up speed in your eyelash application; use your immediate relatives and close friends as models.
You would not want your paying clients to lay in bed for 3 or more hours. Believe in yourself and you'll be successful.

I didn't go through a big company for certification, they don't really "train" you in my opinion. So in order for me to get my certification I had to complete, on 5 models, a full set of 50 lashes per eye in 2 hours. I chose models who work in service industries, where my work and word of mouth could travel. Each of my models I gave 5 cards, and told them to make sure when asked about their lashes they gave them the price that they WOULD HAVE been charged. And that's how my lash clientele traveled. Good luck. Go out a get models do it for free. And get your practice, your comfort level, and time down. They will come. Having lashes that you didn't do yourself, isn't really beneficial, as far as speaking for your work. Make sure you take before and afters of even your models and that you have them sign proper paper work.