Paraguay residence - real one.
Costs next to nothing; usable legit document; if you need to buy or rent an apartment to further prove your Paraguayan residence, real estate in country costs (and rents for) next to nothing. You can even sub-rent it to someone else if you find a tolerant landlord.
Belgium, Portugal, Bolivia are also good - they have taxes on foreign-earned income, but you can just become a non-resident after you get your ID which is valid for years to come. They will not force you to shred your ID when you register as non-resident. Effectively, you pay
no tax, but you still use their ID for
KYC when banking. Easy Peasy!
Panama is an option, but not as good as the shills claim. Costs more, and the reputational baggage is quite heavy, and it almost never leads to a
second passport.
I moved to Paraguay permanently - the best financial decision I ever made.