How Does a Foreigner Buy US Real Estate?

Please excuse my ignorance, but I want to help a family friend. He resides in South America and wants to buy a condo in FL for vacation purposes. He has a visa and has been here several times. He’s asked for my assistance and information about the process but truth be told I’m not well versed in this.
Is there a good source of info for this situation? Things like paperwork needed, financing, etc? Thank you.