It's a big project (we went the custom route) but I'll operate it as a STR and expect it will gross $4,500/mo or more.While appraisals may not have caught up yet, I think you'll see strong sales prices for properties with ADU's.

I made the mistake of not touching my 457B for many years.

These are, or should be standards in design and build, that translate to any and all economic markets:1 - Treat the design as the first few times (changes) you will build, and pay for, the house.2 - Treat the design as a system, made up of a series of interacting systems.3 - Understand that design is a series of decisions, with each decision impacting more than just the immediate decision you are making. 

What made you interested in investing in this type of deal?

We never made an offer - a family friend approached us looking for help because they know we are investors.

What made you interested in investing in this type of deal?

He was probably blindsided by a question asking him how much he made in the last year from his guru like activities.

Where is the highest paying customer?

We eventually sold this Arizona house 11 years later and made a lot of money, but in retrospect we should have kept it.

This could include things like fresh paint, updated fixtures, new flooring, and minor renovations that can make a big difference without breaking the bank.Additionally, make sure to provide the appraiser with a detailed list of all the improvements you have made to the property, along with any recent comparable sales in the area that support the value you are hoping to achieve.