If mine turned 19 on April 1st, does he count for the year?

One other thing that people in their 60s can consider is - if you are planning on taking Social Security and making passive income part of what you live on, rental income may not count as income against your Social Security benefits.

I remember visiting a buddy’s place in Austin years back..he had a similar setup over his detached garage and was convinced that adding a window unit and some carpet would let him count that space towards the home’s total square footage.

Whats the bed bath count, and sqft?

And location makes a huge difference. in Markets that dont move much in value then door count can be critical but in markets where prices may have 2X to 3X over the last say 15 years door counts are not as critical to net worth .

But I'm curious do properties in other countries count?

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.

I think it's a tool you should not count out if it means a tenant leaves in a month vs 6.

You can count on your HOI being raised annually from now until the foreseeable future. 

This amounts to lost opportunity because if you had purchased RE, at the closing it can start producing return. 5) ADUs detract from the existing structure whether this is privacy, a garage, or just yard space. 6) this is related to number 1, but there are many more buyers looking to purchase homes for their family than there are RE investors looking to purchase small unit count properties.