Think about the greatest players to ever swing a bat and look at their percentages.

This coming weekend will be the first time I'll be looking at units to give me the next level of knowledge. 

I think truly the greatest barrier to entry in this area is the initial investment.

Having entry-barriers to anything forces the participant to be able to perform at a certain level of capability prior to entry, and is a form of protection for all participants, both new and seasoned.

Will they stay at the 50% level if repairs have not been made?

So some older buildings can be off level or have other issues. 

The level of activity and involvement are very different, especially when getting started...and they meet different goals/objectives. 

It also has high levels of Radon. 

Specific to you as a real estate agent, track all miles you drive showing homes and write that off in Sch C P2 box 44A (yes I have that memorized) to the greatest extent your CPA tells you it's lawful to do -- this is one of those magic write-offs that minimizes your tax burden while having zero impact on mortgage qualifying income.

Think typical old floor that isn't perfectly level in all places.