The UK is for point system entry. They are not segregated, so a good place to play in, but likely needs a profession in need or so to get in.
Ireland, some small cheap city, as Dublin is massively expensive, and some other cities there are also quite costly. No to low gambling taxes (that's often not the case inside the EU), free world as it is now, so the sites are international at this time.
English helps. Permanent residence to nationality in five years (EU). It is necessary to have a rich enough western country as one retires at some point, until one gets back to where one left. Also, salary, if going in a cheap country, is best to be earned before moving in there. While moving from a cheap country to a richer one, is an opportunity if one gets work, and then one can retire early, if earning there 20+ years first, then move (back) to a cheap country. India is cheap, but getting a residence can be difficult, and they are segregated. Going out every 6 months is a close possibility, some multivisa might be good for five years.
Spain is good for live play, especially Madrid, just taxes, while the immigration depends on getting a flat, and then registering there that has some issues together with getting a bank account, but they accept any regular incomes, including, as far as i read, whatever you monthly deposit yourself on your bank account. In Ireland and UK they rate to ask more or less nothing (no reason), just register. Spain is segregated pretty much, so it is Winamax, maybe some Asian sites, Pokerstars.es, with a rake that's at least 5% €3 cap, though might get 5% rakeback, so Spain is mainly for live poker, that's 20-30 hands per hour compared to e.g. 400-1k hands per hour online, and the casinos might be closed because of the viruses.
Austria is possible, but they are negatively regulated (but not segregated) as they tax the sites a lot, and taxes from winnings after some 10k or so start, and getting a flat can be a bit difficult in Vienna at least. Not an expensive country, or even a city. They have live poker too, but the rake can be a bit high, as it might be with a mandatory tip, and smoking might still be allowed. Not sure how they deal with the EU immigrants if it is a plug and play or are there some residential issues. In all country cases, one might be required to have a full private insurance (100 to 200 euros per month, the latter if old) if not employed. In all countries, one does not sign in as self-employed gambler as it means taxes, and up to double taxes. Just a gambler who has money is fine.
about poker. Ok, I am in Slovakia and PokerStars got off the market for a year, but they are back. It's unregulated and tax free.
VS