Investigate government programs such as HUD, USDA, and FHA loans, select investment techniques such as house hacking, turnkey homes, or purchase and hold, and assess properties using tools such as Grants.gov, HUD.gov, and BiggerPockets.Good luck!

Looking at my first property and there is a severely intense odor in the basement (concrete) and some slight orders on the other levels of the house as well (hardwood floors and carpet).

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.

I'd also find a real estate agent who knows the house hacking strategy or has house hacked themselves if you plan on using an agent. 

Do I have to sell the house before I get another one?

I also house hack and rent a room as a MTR and I've gone with high quality items to ensure durability.

Repairs are a nuisance,  but an expected part of all housing.

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)?