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Mellowgirl evaliered all your options, if you think you will need cash to do better.Then look at the overall cost. Alone or line of credit will give you cash options which is not real than a credit card.
However, interest rate may vary, so you really need to look at the total cost of borrowing for each of the options and what your needs are;
1) Fixed loan
2) Line of Credit
3) Credit Card
I would highly recommend you meeting with a financial/bank advisor and ask them to lay it out for you For each of the options, total cost of borrowing monthly and yearly and then make an informed decision.