Large companies are paying for accountants, attorneys, office space, research, etc.

., there are a few different options for you to explore in this space, depending on your personal financial situation. 

Storage areas can include built-in cabinets, closets, attic space, and even outdoor sheds, etc.Laundry: Including a laundry area and machines is a big bonus for tenants, as they compare that with apartment living where they would have to use common laundry machines that require payment.HVAC: Make sure to include an effective dual heating & air-conditioning system to service the ADU, so your tenant is comfortable in the unit.Kitchen island: It may be difficult to squeeze in a kitchen island in a small ADU, but it’s a big bonus if you can make the space.

There’s a lot of aspects you should keep in mind before you get into this space.  

Unless you are short on space.

One of the units (ground-floor) includes the basement in its living space.

There is no "emergency", if it's broken for a few days buy them a few $15 space heaters.

One of them is moving in from out of state cause he gota new job so family has to move, the other is local. both have families so am having a hard time deciding who to rent to.The person from out of state currently owns a house himself and is planning on selling so should know how to take care of a property, at least that's what I think.The second is looking for a bigger space for his family.

And yes, I have a base understanding of how to value self-storage; thank you to BiggerPockets content and networking through others that have been successful in this space in my area.        

For example, 3'0 doors instead of 2'6 doors (space permitting).