Sounds like you need to do a capability assessment and a market analysis.
In other words, what are you capable of doing, or outsourcing?
What does a "larger business" customer need?
With so many dealers offering "easy credit" these days, you'd be surprised at the number of people who run right out and buy equipment to serve a market / customer they know absolutely nothing about. Or they enter a market in which they are poorly prepared to serve. Don't rely solely on the equipment dealer to give you solid information about these markets.
Another possibility is to expand your business with your present customers. Do they have other needs that you could meet with only minimal or modest investments? That would be the first place to start.
Sometimes in the quest for growth, it's easy to lose focus. A good business plan, and marketing plan will help you stay on track.
When all is said and done, two words best sum it up: "Due Diligence"
On a side note, offering excellent products and outstanding customer service are two secrets that customers find very hard to keep. Those two factors are key elements to growing your business.
JB