Washington state’s capital gains tax, passed in 2021, imposes a 7% tax on any gains of more than $250,000 from the sale of stocks and bonds, with some exceptions.

Trial judge granted them stay with no bond required.

But there are some ways to strengthen your intent argument. 

You can find policies out there that will "bond tenants".

One of my friends said to subordinate the land to a GC willing to build/sign completion guaranties and bond and we split profits along the way. 

Anything you can present to strengthen your case helps. 

I would then safely reinvest this in a low risk option (high yield savings, ETFs, bonds, etc.) and am assuming a relatively reasonable 5% return.

I don’t know the exact numbers but I would have to say something like 50% in real estate, 25% in stocks/bonds/401k, 20% or so in cash and about 5% (minimal) crypto and alternative investments.

I'm liquidating my rental portfolio and pivoting into debt investments and high dividend stocks (generally 10%+) as well as bonds giving high returns at maturity (more debt). 

Invest in stocks or bonds, pay off other debt or , heck, enjoy spending some of your money.