Additionally, regarding the legal structure, an LLC seems to be the most suitable option for our situation.

Beyond real estate investing, BiggerPockets Money has great episodes on how to avoid the middle class trap with your investments - ie how to structure your investment best so that they're not all locked up in accounts with penalties until you're 65. 

Secondarily, if I had a buyer for the land before I close, could I structure the purchase to include them without doing a wholesale deal?

Structuring the DealWhat are some best practices when structuring a seller-financed deal with a partner?

Question: why would one choose to build an ADU when existing structures sell for less than the cost of development?

It’s crucial to consult a real estate attorney and tax advisor to structure the transfer in a way that minimizes tax consequences and aligns with your objectives.

I’m looking to ensure I structure things correctly and attract the right partners.

Replacement cost would be what it costs to replace the structure.  

The customer feature also links to the project feature if you want to make use of that eventually.This structure works great for our clients and their tax pros.

Assets identified in this study include:Standard windows and doorsInterior ceilings and wallsBasic plumbing and electrical systemsBuilding structural elementsBasic HVAC componentsThis engineering-based cost segregation study included the following methodology:Physical Inspection through a site visitDocumentation review including architectural plans, accounting records and construction documentsA cost analysis which utilizes engineering principles in order to allocate costs to their applicable asset classificationsCalculation of the depreciation schedule using MACRSAs a reminder, bonus depreciation started to phase out in 2023.