@Brandon Jefferies,@Dalyn Hazell's answer is extremely helpful.Coming from the lender side, I'll supplement Dalyn's first answer to your question,How to find hard money (or other types of) financing?

I certainly think we had the potential to maybe do another (5) but beyond that I am at a loss to understand how people are doing it.Some background is that most of these houses are what I call light rehab (i.e. cosmetics, flooring, maybe a roof) and we do a mixture of self-labor along with finding supplemental workers where we can as professional contractors seem to be impractical somewhat from the economic perspective but more so lead time. 

I am considering building an attached ADU to supplement my income.

Here's our interesting situation:  we have grown to roughly 13-15 rental units depending on how you count, but we're also starting to integrate more flip projects with the main intention of supplementing our income picture, and ensuring access to capital. 

However, it will be supplementing your living costs.  

She is very trustworthy and would let me handle all of the real decision making, she just wants to supplement her retirement and I suspect she wants to help us with the down payment in a dignified manner. 

Generate additional streams of income to supplement a my job in order to fast track my personal real estate investing (i.e. flipping in Idaho)4.

- so that pot might slow down but eventually grow isn't it and company matches 5% which is free money. and also to save on taxes there are ways to withdraw only limited amounts from your 401k just to be under the radar as you will be supplemented by social security benefits too)and on #4 - the way I was looking at is - ex: I had put in for example 100k in my stock portfolio and that now becomes 180k (8 yrs time) and I keep re-investing in S&P 500 or any good yielding ETF or stocks as you said providing good dividends - I am considering that as one of the pots of income) - combining all pots should provide you enough to sustain the same lifestyle)what do you think ?

I knew I needed to find something to supplement my income, and that's what led me to the world of real estate investing and of course, Bigger Pockets. 

I am also willing and able to use other methods to supplement my growth instead of sticking strictly to the BRRRR strategy.