“Marketing” isn’t just for the big boys. Being a small- to medium-sized business with a small marketing budget means you are looking for the most cost-effective ways to market your business with the most impact possible.
There are many ways you can do this without spending a fortune and still be in with a chance of competing for the same business as much larger businesses. Or going after business that they’d consider too small to go after, leaving the field open for you.
Also, remember, that some companies do not want to deal with large, “faceless” organisations and prefer to partner with and buy from smaller companies to get a more personalised experience and not feel like just another number.