The building is geographically limited creating a shortage. 

Here's an explanation with a sample at the end:Your offer to purchase should include a requirement that the Seller provide all documentation and agree to sign an estoppel certificate (also called estoppel form or agreement).

If getting a simple explanation is so difficult imagine trying to get answers about your money! 

To fix these types of things in some geographic areas may require fixing a lot of other less important things -- know the local building inspector's expectations.

@Dan M.Thanks for the explanation Dan; I think I see what you're saying.

Here's an example of an average property I've looked at:My issue is this: If I'm househacking and I live in one of these units, the rents on the other units are nowhere close to covering the expenses on the house like I was expecting.I think I'm missing something either in my expectations or in my calculations, and I could use some help or an explanation I'm fairly certain of the income, tax, and mortgage numbers, but everything else is a guesstimate 

Here is the link: https://www.biggerpockets.com/blogs/10322/67935-us...Here is another great link with a good explanation of IRR and a few other metrics. https://www.biggerpockets.com/renewsblog/a-guide-t...

Also, the Ultimate Beginner's Guide is a nice, quick explanation of different aspects where you can find something you're more interested in and explore that further. 

I guess my issue so far has been like the knowledge of a realtor, they just seem to be rolling with what I said vs giving a detailed explanation of the neighborhood.

Jonathan has a great explanation of how anything less than stellar management will leave a limited partner with little or nothing to show for it at the exit.