Consider teaching to a yoga niche market such as kids, injured persons, couples, men, athletes, a particular sport, seniors, etc.

Pros of teaching to a niche yoga market:

you create a specialty so you become the go-to studio for a particular audience,
if you specialize in injury rehabilitation, you put yourself in a great position to qualify with insurers if/when private insurance will provide for yoga (I suspect this isn’t too far off),
narrower and more defined market to advertise to (cheaper and more effective),
if you become expert, excellent expert potential with books, DVDs, and being faculty at seminars and conferences,
perhaps you have a real affinity for your niche audience (i.e. kids or seniors or helping injured persons),
because of the narrow field, you can get good search engine results fairly quickly (building a content-based Web site),
off-site teaching opportunities (may not need the overhead of a studio – be a virtual studio.

Cons of teaching to a niche yoga market:

exclude other students outside your niche area,
may have to teach on-site often (this may not provide for optimal teaching environment – i.e. nursing home, rehabilitation center, etc.),
may develop a particular reputation that may be difficult to change if you decide to change your teaching style.