$8K is such a small amount that most people in your situation would finance it via personal credit cards - then let the business pay it back.
If you have equipment that you own outright, you might think about a sale lease back. This is just a paper transaction so the equipment does not have to be moved. Here, you sell the equipment to a financing company for cash (cash in your hand) - then lease that equipment back - making monthly payments just like you would with any other loan or non-equity investment.
Or, get out in your local community and network. I am sure that there are other business professionals (doctors, lawyers, CPAs, other business owners) would would love to be a silent partner for only $8K - plus, they might be able to help you with other aspects in running your business.
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