This is the mistake cash buyers always make. Real

The return on investment is higher and more consistent.Another aspect to consider may be do you want to make real estate investing your biz or focus on other streams/businesses that generate cash flow that buys your passive real estate. 

My ultimate goal is to make real estate investing possibly my biggest source of income.

Do you make really low ball offers & pray for the best?

I remember attending the Millionaire Makers conference in Vegas back in 2001 with Jack, Pete Fortunato, John Schaub, and Jimmy Napier.

It's too early to say if my sister's unit will be a money-maker.

It's a great money maker when the market is hot, but when the market slows it is a very dangerous investment.Also, being a general contractor for new construction is a very challenging endeavor (even more so than with a rehab project), and I would recommend having a very sober perspective on the learning curve, even if you have construction experience.

Even if you keep your job, try to find a way to make real estate #1 as that will keep taking care of you whether you show up or not...

I definitely say these are great money makers but they more then likely will not appreciate much.  

Install all new kitchen: cabs (very small amt cabs), appliances, (no dishwasher), above stove microwave, new garbage disposal, Fridge with ice maker hook up, electric stove, sink/faucet. 13.