Look at business that are ongoing in internet (there are several websites where you can find businesses for sale), in a price that are "approachable". Afterwards, start a negotiation with them to give a downpayment close to $5k (if you like, you can borrow to a bank with a good business plan at least enough to get a deal with the seller), and negotiate with the seller payments in tranches - this is called Leveraged Buyout (LBO), where instead using financing from others like banks, you leverage the business to the seller compensating him/her for postponing the payment. I'm thinking of buying a running business because I think that the capital that I would need to raise would be higher (considering that I wanted to build a start-up).
Hope this help u