They're learning to adapt to changing, even unpredictable conditions.Finance and especially marketing would be some great classes to take.

Experience and knowledge are unpredictable, sounds like you can learn a lot of fundamentals (in your case, more towards construction process and materials) in your current works.

So long as you have set aside what you need for everything predictable, and nothing unpredictable happens, you’re going to be fine.

My schedule is unpredictable, so my windows for viewing come and go quickly.

@Steven HersheyBanks are very unpredictable when it comes to properties.  

If the expert cannot handle, ordinary differential equations for example, they truly have no ability to conduct any kind of market research program unless, they are in charge of a team doing the research and another member or members of the team are doing the requisite modeling.ConclusionMarket Research is both necessary and affordable, but it needs to be done in a scientific and professional manner or the results will be haphazard and unpredictable.

An unpredictable market (which we're in now) is when lots of people lose their shirts. 

In the past, it has been in the stock market, but due to how unpredictable it is I started to look into other opportunities.

For 2% rule, I assume that this is the gross income after the vacancy is considered (as short-term vacancy is unpredictable and seasonal).

When you pay cash, though, your IRR is tied to appreciation, which is unpredictable.