Problems like trespassing, conflict, and unwelcome visitors are common to any multifamily unit.

Connect electric to the common electric for a garage. 

Depending on your area boilers may not be common. 

LOL.) or broke with links or info to the common answers and how-to's.  

I advise against buying condos or anything with HOA fees, relying on the collective financial status to upkeep the property's common areas.

Additionally, flood insurance is commonly available and ensures that for an extra few hundred bucks a year, you're covered both for damage and loss of use (i.e. missed rents). 

Maybe it's not common to have a lawyer in Texas?).

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.

I do standard rentals with the option to buy using three contractsRental agreementOption agreementOffer to purchaseI have a new eviction attorney who is wanting to combine all three contract into one.Is this fairly common?

This is somewhat common….they’ve had a free place to live and don’t want it to end.