Also, you will need to go over the 600 key facts that will help you brush up and give you a stronger understanding of the material.

Does anyone have any tips on how to create maximum soundproofing between upstairs and downstairs, whether it's using certain materials or certain construction techniques?

any building materials you can get free that are scrap or cheap?

The GC there hired hired a kid to basically sit and watch the vehice and materials all day every day so no one would steal.

We pick material, finishings... make the house flow (people like open concept now so we move walls where we can, etc). 

We have a few from overseas that have a tax requirement of showing material costs on larger items (furnace, hot water tank, windows, roof etc) so we send them material receipts.  

If you are considering an prefab ADU, take a look at the prefab options with Back Porch Homes, they are prefab stick built homes and all materials used can be replaced/repaired with products you can find at your favorite hardware store instead of specialty stores like more manufactured homes.

You arent taking into consideration rising lumber and materials costs , contractors are busy and wont get to your job for a month or two .

I can come back in person for only a few weeks out of the year (gotta stay tax exempt), so basically one big trip home each year or so.I've got some good reading material for tonight, and hopefully I can find a few hours of stable connection tomorrow as well. 

I do not possess the creativity when it comes to home design to decide how I want the kitchen or bathroom to look and what materials I want to use.