If you plan on staying a long period of time on Aruba, renting a house might be the perfect solution for you. And if you plan on staying on Aruba for long periods of time every year you might even consider buying a house. You don't have to live on Aruba permanently or be registered as an inhabitant of Aruba to buy a house, everyone can buy a house.
If you are not an Aruban national you will need a permit to stay here for a long period of time. Foreign nationals who intend to stay in Aruba for a period longer than 3 months (90 days) need to apply for a residence permit. Foreign nationals who would like to work in Aruba need an employer that sponsors their work permit. Tourists are not allowed to engage in any paid activity in Aruba.
The work permit is in addition to the residence permit; these are two separate requirements. In general, a residence permit does not allow employment. Citizens of the Netherlands or the Netherlands Antilles may stay up to six months. For more information on how to get a permit check living here.