Some good ideas for low budget marketing would include some of the following:
1. Create a Comprehensive Marketing Strategy
Depending on your niche, you may find that one method of marketing works more than the rest. Strategies may include direct mailing, business cards, website promotions, in-store promotions, referral programs, and more.
2. Utilize Social Media Sites
Facebook, Twitter, and LinkedIn are the most commonly used.
3. Join Some Networking Groups
Businesses in similar but non-competing niches are great for referrals, as they'll often recommend others to the people they can't really help.
There is a great article on basic marketing tips for a small budget at:
http://www.businessguide.co.za/1/post/2012/10/5-basic-marketing-tips-for-new-small-business-owners.html
Or contact companies like
1pieceproductions.com to help you with your online SEO and advertising/marketing.