SBA loan and seller down payment?

Hello. I have two questions involving purchasing a business. What would the minimum down payment be to purchase a business through the SBA and the requirements to do so? And... Would it be possible to have a business with seller financing, and still have a loan through the SBA. Here's an example of what I... show more Hello.
I have two questions involving purchasing a business.

What would the minimum down payment be to purchase a business through the SBA and the requirements to do so?

And...

Would it be possible to have a business with seller financing, and still have a loan through the SBA.
Here's an example of what I mean:

Business for sale: $300,000.00
Seller requires: $100,000.00 down payment
Let's say I have: $30,000.00
I need: $70,000.00 from the SBA

Could I still purchase this business if I technically only had $30,000.00?

Thank you so much and all responses are greatly appreciated!
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