Here is a list of what adding ADUs in my CA market is typically a poor RE investment:1) The value added by the ADU addition is often significantly less than the cost of adding the ADU.

Great use of space and provides additional income to offset the monthly payment.Orlando, and many other cities, have a "missing middle" problem in regards to housing. 

Probably go for a 3 bedroom with an office or dining I could convert into a 4th bedroom and shared common areas, would have covered everything with airbnb and still covered most with long term. 

Additionally, ensure that all necessary notices for filing an eviction have been posted and properly documented in your records.

In both you are now paying taxes on an additional $1K/mo.

The cons as i see it include loosing the 2 of 5 year cap gain exception, typically not an ideal rental because the emphasis at purchase was buying a good home for your family and not a rental with optimal return (my ex-home consistently has the lowest cash flow for equity in my RE portfolio), not disconnected enough from the property causes addition angst on damage and may result in over improvement.  

These are also the banks that are more commonly relationship lenders and will allow your originations to out pace your balance sheet if you are consistently able to execute on the projects they fund for you.

@John BerjIf cash flow is a top priority, factor in HOA fees (common with new builds) and confirm rent comps to ensure the numbers work.

That means having procedure and protocol for every situation--or at least, every common situation. 

An emergency fund needs to be liquid, and immediately available to you in addition to being low risk and protecting principle.