Using a personal credit card will not increase your personal liability for debt, as you would be personally responsible for repayment with any card branded for business use. Furthermore, a personal credit card will actually give you the benefit of CARD Act coverage, which means the issuer will not be able to increase the interest rate on an existing balance unless you become 60 days delinquent: http://www.cardhub.com/edu/card-act-guide/ .
In addition, you may want to sign up for our sister site WalletHub for free daily updates to your credit score and full credit report: https://wallethub.com/join/ . Hope this helps. Please let us know if you have any more questions.