Family members of the main investor are the direct unmarried descendants of the spouses, who are under the age of 21. After that, it is possible to acquire a renewal as an independent residence permit until they reach the age of 24 and then it is possible to renew it further according to pertinent immigration legislation. But since your son is going to be married, one of the above conditions cannot be fulfilled anymore. In such a case, if you don't have other children, already included in your application, and in order his wife to be also included as his family member, you should examine the option either to sell your property to your son or to transfer it through parental concession, after examining in advance the tax value of your property.
