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So, good news. Unlike most countries, a person does not need (1) a special license or (2) a special visa to purchase real estate in USA. Anyone can do it.
No special license or certificate is needed to buy real estate. Anyone can do it. All they need is proof of identity for the sale (the seller or their attorney will likely insist on it).
No special visa is required to purchase real estate. Plenty of Canadians for example have property in USA and travel here on different visas and stay at the property when they do. However if you plan to use a lender for a mortgage, the lender may have certain requirements for visas - this is up to the lender.
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