If you’re still concerned, you could consider installing programmable thermostats or low-flow fixtures to help control costs without relying entirely on tenant behavior. 

I'm sure you and I both understand that as flippers, having control over the construction cannot be stressed enough.

@Dylan Jeluso, where are you feeling you don't have control?  

Also make sure you understand everything about adding an ADU including value of the ADYPU, financing, impact from rent control, duration between initial expense and initial income, true cash flow (know the 50% rule, at 50% rent ratio initial property tax will be near 20% of income)- educate.  

This implies residential units can be built at lower costs than ADU additions and provide better return. 11) adding an ADU to SFH can make the SFH fall under rent control.

Wishing you a fantastic weekend!

I liked craigslist because I feel in control using it and can tailor to my preferences.

Do you feel this is controllable or that it's mostly up to chance who succeeds and who fails? 

Where are the HVAC controls and do both units have the ability to access it?

Offer the design team a piece of the equity OR pay a premium as incentive to keep to an established timeline (that is within their control).