What is your business type: LLC, S or C Corp, etc.? What type of accounting processes do you have?
Do you have a detailed, written business plan (
https://guykawasaki.com/how-to-create-an-enchanting-business-plan-officeandguyk/)?
Have you done your five year financial plan including earnings before interest, taxes, depreciation, and amortization (EBITA) - if not, get started.
It is indeed now just a hobby unless you want to get serious...no one will lend you a nickle (maybe friends and family) unless there is a coherent business and financial structure in place.
The biggest limiting factor to growth is the ability to absorb the cost of doing business while waiting for payment from clients - access to capital in this instance is often called a bridge loan. You'll need the above and a recognized accounting system in place with a history. The fact that you have no debt is a major plus.
Get started now.
I love small businesses. Best of luck.