Most of those lines of credit start with 12-18 months of 0% APR, and the idea is that you can just apply for new cards once that introductory period is up. 

If you haven't visited one of our 2 monthly BP meetups, we'd love to meet you and hear your story.

In Florida where I live, those two items cost me about 25-33% of my monthly income on a LTR.  

This is a good model but doesn't account for a return of the $500k your parents will contribute..For example if the property generates $10k per month with $6k in PITI & operating expenses the proposed return for your parents would be: $2k and $1k for each of the minority partners.

I am more worried about a tenant who makes $140k a year and spends $4k a month on rent.When you make good money you don't need to follow everything by the books to survive financially. 

We pay $110 per month for routine maintenance. 

A month later I tried to turn the gas on and put the service in my name.

If it is over 6 months you should not have a problem getting 75% LTV. 

Do I have to also write down each task in the moment, or can I go back over a week or even a month and flesh out the details in broader strokes?

I recently use to be a Pro member but had to put my membership on hold after buying my first home a month ago.