My best advice is start with personal recommendations from friends and family in the area, try driving for contractors; kinda like driving for dollars, but you are looking in areas where there is a lot of investor activity and start collecting cards.

Paying your cards down will also up your score.

You can email invoice that has the link to pay online or auto-draft customer's bank (free) or credit card (3%-4% fee).

MIP forever in that case.If you also have credit cards and car loans you will probably be better off paying those. 

The rest goes towards our mortgage or vehicles and we carry no credit card debt with a combined $14k we owe on both of our vehicles.We are now looking to start purchasing rentals to expand our portfolio.

We are at the beginning stages of starting our business - getting business cards, etc.  

If you're thinking about conventional/bank financing, they'll look at your monthly expenses to determine what you can afford (rent + car/student loan payments, credit card payments, etc.).

You might be able to find some 0% APR credit cards, but they typically balloon back up to 9% or 15% after the 'teaser period' is over.

Some links offer land that be Bought with a credit card.

I would definitely paste their card to the inside of a kitchen cabinet for the next owner to call when they need service!