I have very little Real Estate investing knowledge but interested in learning about wholesaling, lease options, buy & hold to supplement my income.  

I would like to begin investing in buy and hold rentals with the hope that as my kids get older and we have more of them I will be able to supplement my income to provide for them and help them get started with their future when the time comes. 

My current goal is to look for properties for cash flow to help supplement retirement income in the near future (possibly 4-8 years from now.I could extend that time frame). 

I don't even consider them as supplemental income.

Are you taking supplements?

I'm open to getting a loan to supplement any extra income I may need.

I keep all of my reserves in a savings account earning 5.25%.Another consideration is how much steady W2 income that you have to supplement repairs and maintinence as issues arise.

This is just a preliminary filter and should not be supplemented for a thorough analysis of revenue, expenses, and possible expenses.

I would like to get more involved in real estate to the point where I can get 10+ plus units to help supplement retirement some day.I am looking to learn and open to any and all advice on next steps. 

And given the dearth of real talent at the hot corner these days (as evidenced by my fantasy baseball teams), I'd say you need to stick with baseball so you don't lose focus.Real estate investing is only for those people who are trying to get out of their day jobs and/or supplement their day job incomes to improve their quality of life.