@Levi Cartwright!
As others have said $20k saved and an $86k per year salary at your job at just 18 years old is extremely impressive already. Congratulations!
Let me ask you one question that I had as I read your post: why only $150k purchase price limit? Have you spoken with a loan officer/mortgage broker? Is that the max they told you you can qualify for?
Another question is are you looking only at singe family homes (e.g. planning to follow the rent-by-room strategy)?
This is just my personal opinion from my own experience, I would much rather buy a duplex, triplex, or fourplex over a single family house as a house hack. However, it is of course location (e.g. maybe there aren't any multi-family properties available in your market?) and price (e.g. maybe 2-4 units are much more expensive and out of your budget?) dependent.
In my market, in and around Albany, New York, one can buy a decent two-family house for $200,000 or less "on market." Assuming at least 2 bed, 1 bath per unit, they would probably rent for $1,100 - $1,200/unit/mo when updated. Updated 3 bed, 1 bath units can rent for $1,500+/mo.
Doing a quick Zillow search for multifamily properties in Tacoma, Washington, it seems that there is not much inventory and what is on market is listing for $200,000/unit. That definitely seems pricey by comparison. Zillow doesn't appear to provide rent amounts, so I'm curious what these units are renting for. Any idea? If you're not getting over $2k-$2.5k/unit/mo over there at these prices, I would say maybe you should consider looking in nearby areas for your first house hack where the price-to-rent ratios are better. What are your thoughts?
Vitaliy