Plumbing all that to the house is a couple grand more before rough-in.My property is in a very rural area right next to a popular ski resort plus it is elevated on a ridgeline.

In a city like LA especially, you will need to make sure your rental is set apart from others, so I would have a sizable budget for furnishings and design.

The low bids likely don't account for the entire scope of work required to design, permit and build an ADU, including requisite utility upgrades and other site improvements.

There are still a good amount of out-of-state investors reaching out for financing...areas like Akron/Canton, Cleveland, Cincinnati, Toledo, Dayton are popular. 

In addition to FHA, I have a conventional loan with the option to put as little as 3% down as well a speciality product that has lower rates if the property is in a designated area.

Sometimes the suburbs are even better than the main areas, especially if they are close enough to the popular areas.

Opt for landlord-specific coverage: Ensure you have a policy specifically designed for landlords, which may offer better rates and coverage tailored to your needs.3.

https://www.biggerpockets.com/blog/short-term-rental-loans-a...DSCR Loans: Terms to Know When Working With These Popular Rental Loanhttps://www.biggerpockets.com/blog/dscr-loans-terms-to-knowWhat’s Next For DSCR Loans?

Ingrid,I would make sure you designate a spot in the front or back yard located away from the house.

Without knowing more details about the specifics of the project being proposed as it relates to your property, it's hard to say if there are any obvious big red flags that could negatively impact your property's future value.That being said, I would try to find out as much information as possible about the new apartment building's design and layout - the two big things I would try to ascertain would be the location of the garage entrances/exits, as well as the location of any outdoor amenity spaces (pools, terraces, dog runs, etc).