I would suggest getting a true business credit/charge card as you may want to draw the line between business and home as far as liability reasons (even though you are still personally responsible for business card charges).
Several years ago the credit cards used to hand them out like candy and didn't require much if any proof of income --- as we all know --- things have changed!
My top two favorite cards.
1) Amazon Chase Business Visa. no annual fee. 3% back on amazon purchases. 1% back on everything else.
2) American Express Business Platinum Charge Card. Yes there is a hefty annual fee but there are many benefits.
