Is there a way I can find out if promissory note was converted and sold?

@Jade Frank I agree with what @Dominic Mazzarella and others are saying here, but If you find the downside outweighs the gain and you ultimately decide to sell the property, Since the property was held for investment use it would qualify for a 1031 exchange. 

If you do not have experience you may find there are a lot of hidden costs and risks you didn't anticipate. 

If you find you are unable to raise the money for an all-cash purchase, switching gears to Fannie will only work if you have a LONG time to close in your PSA or have many extension options (which usually require more hard earnest money.)

You’ll likely find a strategy that aligns with your goals and lifestyle.Since you’ve been enjoying the BiggerPockets Money podcast, I’d also recommend checking out the Real Estate Rookie podcast—it’s great for diving into beginner-friendly strategies and learning from others who’ve been in your shoes.Feel free to reach out if you want to chat more or bounce around ideas.

Please advise.ThanksMelAllstate: They offer a range of property insurance options.Farmers Insurance: Known for providing various insurance policies, including for rental properties.Liberty Mutual: Has a presence in California and may be able to meet your needs.Nationwide: Offers property insurance and may have suitable policies.Good luck in finding the right coverage! 

In this case, get familiar with NYS landlord/tenant law or find someone who is. 

I can't find much.

I'm looking for advice on whether I should purchase my father-in-law's 6 unit apartment in Burien, WA (10 minutes south of Seattle) as my first deal, or perhaps help find him a seller that would pay more than I could and is a couple years ahead of me in REI. 

While I'm not sure if this property is in EBR or not, I'm finding the average FMR for 3 BRs for all zip codes in BR is over $1,500.