I just sent out a post card mailing, and am scrubbing a list to start cold calling. 

I'm trying to increase my spending on my US credit cards to get extra airmiles.

The 3-day session has a few nuggets of good info sprinkled in here and there, but is ultimately designed to get you to sign up for "advanced training" to the tune of about $9k per course, or a $40k "special offer" on a bundle of courses.See this thread: https://www.biggerpockets.com/forums/79/topics/185...The afternoon of day 2 focuses on how to manipulate your credit score by raising your credit card limits, and the homework for day 2 is to see how high you can get your credit card limits raised. 

, credit cards (shows poor money management), auto loans (if they won't pay their car bill, knowing that the car can be easily repossessed, then I'm less confident they'll pay their rent), etc.You don't say what type of accounts these applicants have in collections, but the fact that they pay their student loans "promptly", always paid their previous landlords on time, and their income "more than meets your requirements" are all very good signs.

I've read a few blogs regarding using credit cards to fix and flip properties.

Second is all of your recurring monthly debt payments (PITI, auto loans, student loans, minimum credit card payments, etc.) divided by your monthly income.So, as an example (specific numbers would come from your lender): a lender may allow a maximum 33% for the first DTI calculation and maximum 45% for the second DTI calculation, and they will require that you are within both ranges for both ratios. 

Any advise on what to do next since I'm out of cash and with a few credit cards dept, nothing crazy but some.

As I already have a bank mortgage and currently lowered my credit score with poor choices and credit card debt from learning experiences or some call them mistakes lol. 

I'm being more careful about my thought diet.What's are you directing your blog's readers to think about?

Now you have low interest and (more importantly) no fees.Another alternative is credit cards at zero interest.