The basic idea is straightforward: a government offers the right to live there to non-citizens who place a minimum sum in buy property in genoa. The qualifying amount is set very differently between countries, and legislators adjust it regularly.
One key point divides a residence permit and a passport. A residence permit gives you the right to live in the country, generally with renewals, but a passport normally requires far more time and additional conditions. An agent's promise of citizenship in exchange for buying an apartment is reason for caution.
Beyond the purchase price, programmes carry further conditions. Common ones involve a police clearance certificate, medical insurance, proof of income and a minimum number of days in the country per year. Ignoring one of these can end the status while you still own the home.
Fiscal residency is an entirely separate matter. Having residency does not by itself make you taxable on worldwide income, though living there for olbia real estate most of the year frequently does. A number of states apply a day-count rule, and the consequences touch foreign income.
The practical advice is the same everywhere: pick a property you would want anyway, and let the permit be the second reason. Such schemes are suspended with limited notice, and a home selected purely apartments for rent in portugal the status proves a poor asset once the rules change.