The underlying principle is straightforward: a state offers a temporary residence permit to overseas buyers who place a minimum sum in housing. The threshold is set very differently between countries, and the authorities change it regularly.
A crucial distinction separates the right to reside and citizenship. The permit gives you the right to live in the country, generally on a renewable basis, but full nationality usually demands a long period of residence. A promise of a passport in exchange ruse real estate for sale buying an apartment is a red flag.
Past the headline threshold, programmes carry extra obligations. Frequent requirements include a clean criminal record, private health insurance, proof of income and a required physical presence in the country each year. Ignoring any of these can end the permit while you still own the home.
Tax status forms a different question altogether. Holding a residence permit does not automatically make you liable for local income tax, though crossing the day-count threshold often does. Many countries use a residence test based on days, and the effects touch foreign income.
The practical advice is simple: pick a buy property in kissonerga you would want anyway, and treat the permit as a bonus. Such schemes are suspended sometimes at short notice, and a home selected purely for the status becomes difficult to let and difficult to sell.