@Chris Fentiman Although it’s been about 20 years now so figure in some additional costs for price of materials and labor increases and inflation but I reroofed an 8000sq ft 3 story Tudor style house for about $20,000 removing shingles and replacing plywood as needed and laying an underlayment.

One way street made it difficult at times to not piss off the neighbors when dropping off materials.

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?

If the aplicant(s) fail to sign the rental agreement, fail to provide additional funds required for occupancy or does not take occupancy on the scheduled move-in date, this holding deposit will not be refunded to the applicant(s) and will be retained by the owner/manager.add places to sign, date and name all parties below etc.  

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.