Additionally, I expect applicants to follow instructions in the advertisement and application, to make and keep appointments, to show up on time for appointments, dress and behave appropriately at appointments, and in general demonstrate throughout the process that they are someone that is easy and pleasant to do business with.

In most single family zoned areas adding a single ADU is not a value add meaning it will not add more value than the hands off cost of the addition.  

Your post neither provides valuable or additional information nor did you post direct questions like the rest of us do.    

Your primary strategy should be to have the Contractor and all Subcontractors add you to their insurance policy as Additional Insured. 

Even with that additional cost accounted for it looks like the guy made out like a bandit.

We are willing to provide additional documentation to support our request and discuss any potential steps to ensure a smooth and fair process for all parties involved.Thank you for your attention to this matter.

In addition, condos tend to not appreciate as fast in value compared to single-family or multi-family homes. 

Additionally, the presence of POHs vs TOHs introduces further operational complexities and elevates overall costs due to increased maintenance and management responsibilities.However, without detailed information regarding the specific septic system configuration (gravity, pressure distribution, mound, cluster, etc.) as well as the system's age, historical performance, and required maintenance frequency, it is challenging to derive a precise expense ratio.

Outdoor storage, moving services, additional parking.

In addition to these you can find information about appreciation.Many of the people recommending expensive properties are doing so because of appreciation.