Now, my question is:Would it be worthwhile to get my real estate license and represent myself?

You can also find out the pay-off amount to see if it's worthwhile to just pay it off.Then, it's just an additional expense (and lower utilities for you and/or your tenants)

If your plans include 5+ flips a year this may be a worthwhile investment.This is just my insight and subject to change once the inventory begins to meet demand. 

And because we weren't using it much ourselves, it just wasn't providing the returns to make it as worthwhile as we would've liked. 

It may have already been mentioned, but on your tax advantaged accounts, it is VERY important that you do a direct rollover , Roth to Roth, regular IRA to Regular IRA etc so that you don't end up owing taxes.You might check to see what your cost basis is on your regular stocks, it might be worthwhile to sell some of them at a time.We personally have our retirement accounts with a discount broker and have some stocks and some ETF's within it.

If you were going to take your $150K and invest in another market that cashflows better on average than Bellingham then it might be worthwhile to look into some possibilities. 

The good news is if you find something worthwhile you buy it for face value, no bidding.

It will be paid off in 8.5 years at which point we assumed it would make the break-even periods worthwhile.

Anything below 500-600k to buy is so ridiculously competitive you pretty much have to be a contractor yourself to make a worthwhile profit, but the deals get progressively better as the numbers go higher. 

One option if you truly want to keep the property and are willing to GRIND this out to make it worth while in the long run.