Here's a first stab at a list for those of us that aspire to be competent and confident in the realm of personal finance: Less than a month: Emergency - one bad day from homelessnessOne to three months: Urgent - a moderate amount of bad luck from homelessnessThree to six months: Whew - The baseline of being able to sleep soundly at night, still in all-out hustle modeSix months to two years: Satisfactory - no longer afraid continuing to support one's self/family if job/business is lostTwo to five years: Well-off, Investments are just starting to produce meaningful amounts of supplemental incomeFive or more years: Confident - Investment income may be even more than most people's salaries25 Years or more: Financially Independent - even with the conservative 4% Safe Withdrawal Rate$100,000 more passive income than one spends to support their lifestyle: Wealthy$500,000 or more in passive income above and beyond what's needed to support one's lifestyle: Ultra WealthyThoughts?

I did this for a while and it helped supplement my real estate commissions.

I hope at some point, I'll be able to supplement my income with real estate and just add to my cash flow line.

We are looking to supplement his future teaching salary with outside income through real estate investing.

You'll need regular insurance and you'll want to supplement that with umbrella insurance.

Has anyone opted for the "supplemental Income" plan?

The positive cash flow can supplement another income source and make for some extra income. 

I eventually want to go real estate full time but need a job to supplement me in the mean time.

Not having a job and supplemental income source or cash buffer torpedoes your pillar to negotiate.

You will never stop learning. but it's not hard to build a solid foundation to start from.You can supplement your learning with BiggerPockets as there is a lot of great talent here, and I/we love to help.You mentioned "fine tuning my niche market".