Lately taken a big interest in options trading (loving LEAPS) to add a bit more leverage/risky investments to the otherwise traditional stock portfolio (index funds, stocks). 

My first question would be What is a good method you would suggest someone use to build credit starting from 0?

If you are able and willing to do some of the work yourself, you can save a good deal that will help you control prices but remember, the trade-off is that the project will take longer and increase holding costs or renovation costs.Finally, be willing to use us on BP as a resource. 

It's strange to think that "re-finance" is referring to ANY finance method, not just an existing mortgage

Working 30-40 hours a week might be ideal while you learn a trade or take college classes, or even get a degree.

Finish paying off the house (around 4 months), then saving up enough money to pay cash for our first rental (probably 2-3 years), then use the BRRRR method.2. 

There is going to be a trade-off between cost versus quality.

So we can go traditional lending.We want to flip and BRRR2-part question: For the rentals: BRRR- Is it better to take out a loan and finance the 1st rental and use the BRRR method?

$4000 across 3 doors is $1300+ per door-- likely better than any cash flowing asset you would be trading into.

Are there other methods to drum up interest to get this property sold?