Answer
Different sources of income may be suitable: employment, business ownership, income from outside Uruguay, and rental income from real estate or movable property. The fact that funds originate abroad does not automatically exclude them from consideration.
For economic ties, not only the amount but also the reality of the connection with the country matters. Local employment, registered business activity, long-term contracts, taxes, housing and regular transactions can demonstrate that connection. An empty company without clients is less persuasive than an operating business.
Each type of income should be clearly documented through records and payments received. Employment requires a contract and payments; a business requires registration, accounts and turnover; rental income requires proof of ownership, a contract and payments. The more clearly the regularity of the income and its connection to the applicant are shown, the stronger the supporting documentation package.