(The cool thing about the Portugal program was you only needed to be present 7 days/yr, which means you could retain residency somewhere else, e.g. Puerto Rico, during the 6 year wait for permanent residency or the 7 year wait for citizenship. Real estate also doesn't have FATCA reporting, and thus isn't restricted from US persons; the fund investments, etc. are more annoying. The 250k EUR donation route is not actually that horrible IFF the citizenship is certain, but it does not seem to be certain.)
Caribbean CBI is $100-200k but is faster (6-12mo, easy) and doesn't include right to reside in Europe, but it's just from a marketing/aesthetic/brand perspective worse than Portugal. Turkey is another option, although it's USD 400k RE investment now, vs. USD 250k, and Turkey's current politics are...spicy, although I'm pretty bullish on Turkey as a country in >10 years (and sooner if changes happen.)