I want to buy an existing business but don't have money for a down payment, do I have any options?

They are traps. You only need to check the interest rates, and do the arithmetic.

Getting an unsecured loan from a financial entity for this amount is unlikely going to work for you. Your options are likely the 3Fs (friends, family and fools) at this stage.

Maybe you can find a partner who thinks it's as good a deal as you do, but if you don't you should also consider that it might not be.

Any sane person thinking of going into business should make a detailed costed business plan. In order for this to work, the money you make from the business has got to cover the loan repayments, and also give you something left over for yourself. If you gave up a job to run the business, if this left over amount was less than your paycheck, then you are going to be worse off. If there was nothing left over, then you would be like someone going up a down escalator, you would be running hard just to stand still, and have no money to live on into the bargain.

Any time the business started to make less than you needed to cover the loan, you would start going downwards, and it would get harder and harder to get back to where you were, especially considering that these unsecured loan companies charge hefty interest, and also big late payment charges. You could soon wind up bankrupt.