For instance, make an opportunity to scan the interior of the applicant's vehicle - if it is messy, your rental will be as well.

My top strategy now is an ADU conversion or home addition that I could design for STR (separate kitchen, bathroom, etc.).

Understand the goal and design the path to get there.

We have design ques we always try to implement that we will definitely apply here.

But it's designed to get you to get involved with what ever that "guru" is talking about .

They are specifically designed and built for that purpose.

As others have said, good marketing exposure (Zillow, FB marketplace), a sign in the yard, a good product (meaning the interior and exterior of the house) and a good, competitive price should lead to finding a renter quickly.

No buying list, no designing mailers, no spending money sending mailers, no skip tracing, no no no.

The pass-through would occur in the partnership or s-corporation scenario.The taxation of the income would depend on the designation of the taxpayer whether they are considered a real estate professional or passive investor as well as whether they are renting or flipping for example.  

I could be wrong but I don't think most of the area City building departments require testing (lead or asbestos) for interior demo work.