I get lots of such supplemental property tax bills.  

I am interested, as of right now, in either single family or multifamily investing.Currently my basic real estate investing goals are meager, supplement my current salary with passive income from rentals.

I hope to acquire enough properties to supplement enough pay in rental income to leave my job to pursue flipping options or further rental possibilities.

Is there anything I can do right now or within a year to supplement my income to leave my job?

My main goal is to supplement my retirement income with $5K in passive income.  

There is a ton of supplemental resources on the website to help you with your first few flips.

The income from the properties would initially be used a a supplement to my income but I would eventually like to have real estate become my primary source of income.  

For example, taking 100 acres and making a city, how cool would that be.The good thing about REI is, its flexible and you can do it as a supplement to whatever your doing now or plan to do.I say do both, maybe use your RE license to fund your education in architecture.I agree wholeheartedly with @Ryan Koehler , especially if one is independent.

My goal is to supplement my pension upon retirement by creating enough cash flow to sustain my family without having to lose quality time with them.I am eager to learn and look forward to engaging investors here.

Supplement that with all the things you can learn here on BP and you'll be good to go before you know it.