On this property I had to purchase all materials, which i saved 5% with my lowes card.

See if you can get a card reader duo. 

@Brian S. waiting till you get a deal on the horizon is a good idea, but it you want to be able to execute faster I can suggest bundle the mortgages you have under one portfolio loan (as suggested by @Jerry Padilla above) and then open a "Line of Credit" with the same bank.It acts like a credit card, and you do not have to pay any fees if the money not used (some ask for yearly fee of $50-$100).

I have some credit card debt and little student loans I would like to pay off before looking into homes and taking the plunge.

When I was actively selling in NYC I always met the appraiser at the property, gave them my card and three comps, plus a list of any particular improvements I wanted to point out.  

Seller holds all the cards.

I'm thinking about putting a $30k rental property on my credit card.

On most HELOC's you will have 10 years to use the cash as a credit card type basis, after 10 years, you can no longer draw on the line of credit and must payback the balance over the next 20 years.If you want to restore your ability to draw on the HELOC, just replace the HELOC with a new HELOC.

I'm not affiliated with them or anything but I know they could help you get financing and help me get a "cash" sale you know.www.lightstream.com/land-purchase"I have personally used them (I wouldn't give a suggestion like this without trying them myself) and it was as easy as applying for a credit card.  

Roesel I would recommend working your but off to save, use good credit cards, a good personal loan (lightsream or sofi) and friends and family to finance.