Uruguay has a residency route designed for retirees and pensioners: by proving monthly income in foreign currency and a link to the country, the process runs through the Ministry of Foreign Affairs and does not depend on buying property.
Pension income from abroad usually stays outside the Uruguayan income tax base during the first years of tax residency, and there is an option to extend that period. It is worth confirming your situation with a local accountant before moving your tax domicile.
In practice, people who move choose between the calm of the Rocha coast, the infrastructure of Punta del Este off season, and city life in Montevideo — with hospital, pharmacy and bus within walking distance.