With a limited marketing budget, an optimum strategy to consider is investing the majority on your website development, making this as comprehensive and effective in search engine promotion as possible. Additional promotional activity can then be restricted in terms of content to reduce costs, concentrating on a benefit “hook” to gain attention with a single call-to-action of going to the website.
For example, you've produced your website, explaining your value propositions in a professional manner. You are now looking at producing an advert for a newspaper (let's put aside the validity of doing this, as I discuss here). Take a look at adverts in your local newspaper or parish magazine and see how many pack in as many features of their services as they can. Now consider how much more effective it is to simply state one big benefit of your service (your hook) and only add your website link for referral. And how about not even adding a phone number? That way, you'll force people to go to your website, see your professional presentation first and hence reduce timewasting phone calls to you.
There are then several low cost or even free websites that you can use to develop additional online promotion, used to drive traffic to your website and reinforce your desire for an “expert” status (creating “e-noise”). For example, one approach is to write articles and get them published (write a sufficient number and you can acquire an expert prominence). The use of social media is of course another method.