Also, check the amenities available, that will run the HOA dues too.Location-wise, check whatever will be easier to rent in the long run.Also, depending on how you're comfortable with sharing your apartment, 2 bed could be a great house-hack.

And others want a big yard for the family and to not be 15 feet away from the house right next to you.Now, that's all fine information.

Worst house in neighborhood.

Seattle has become more lenient on ADU regulations because of the housing shortage. 

A few things that jump out at me, in addition to @Don Konipol Comments…-$1,500/yr for insurance on 8 houses (less than $200 each)?

I was only able to do this because I had the numbers to support (similar housing rents, increase in expenses) that it was a reasonable raise in rent. 

I'm a house hacker doing STR through airbnb in NW Raleigh.

I'm currently helping an E5 engineer with a house hack in the college area out here in San Diego. 

Also if you have not yet, I would recommend that you start by house hacking a 2-4 unit first

I give you one example, sometimes I have a though choice when I tried to flip hose, the seller doesn't allow inspection and the house is priced 1 mil (comp is 1.5 mil).