Most small businesses are operated as a loss.
In the books, you pay all salaries, you pay rents / mortgages, the electric, the heat, sewer, blah, blah, blah. bu tin the end, the books will show a loss.
As an manager your salary is your 'profit'.
As an owner, the fact that the business is growing is your 'profit', the owner's benefit is the loss.
There once was an IRS rule that each business had to show a cash profit once every 3 years, then once every 5 years, but that rule went away. Now each business must have the stated intent of showing a profit in the future.
If you are going to have an investor, then you will need to grow from being a sole proprietorship. Into a limited partnership or a corporation. The corporation gig is likely the best for you.
Your business then needs to be assessed, so you know exactly how much it is worth. then as your investor invests into it, you can both say, how much he owns and how much you still own. His 'investing' is slowly buying ownership from you. Corporation lawyers will be needed.
As a corporation, your business could be paying you a salary, while giving him the write-off losses.
Good luck