You don't have to be a big business to use a marketing agency. There are plenty of boutique agencies out there who can offer you an affordable package. First, identify your goals. Then, find a marketing agency that fits your budget and your brand.
Businesses that align their sales and marketing teams can generate and close customers more efficiently and effectively. Businesses that don't will often have a disconnect between the two teams. This can damage lead flow and cause finger-pointing.
Without spending a dime on ads, you can still sell your product or service through LinkedIn. Make connections, utilize LinkedIn's powerful search tools, and post great content to get your foot in the door with new prospects.