The underlying principle is simple: a government offers the right to live there to non-citizens who invest a qualifying amount in housing. The qualifying amount is set very differently between countries, and the authorities revise it with limited notice.
One key point stands between the right to reside and a passport. Residency allows you to live in the country, usually on a renewable basis, but citizenship generally takes far more time and additional conditions. A promise of a passport in exchange usa villa for sale an apartment purchase is a warning sign.
Beyond the purchase price, such permits impose additional requirements. Common ones include a clean criminal record, private health insurance, proof of income and a required physical presence in the country per year. Overlooking any of these can cost you the permit while you still own the home.
Tax residency remains a separate question entirely. Holding a residence permit does not by itself make you a tax resident, but spending enough time apartments for sale in mijas the country often does. Many countries use a residence test based on days, and the consequences touch income earned elsewhere.
The practical advice remains simple: buy something you would be happy to own, and treat the permit as a bonus. These routes are suspended from time to time, and a property chosen only houses for sale in sandanski a permit can be hard to rent and hard to resell.