The visa sponsor's financial responsibility
[QUOTE=Beijing4987;2490413]If one marries a foreigner you may be responsible for them for 10 years. The US government in this case would have a lien on your property. Anyone willing to fact check this? A lawyer told this to my friend who was enamored with a Brazilian woman.[/QUOTE]I did a lot of research on this a couple of decades ago and, at that time, the deal was if you were the person arranging for a fiance visa and the lady stayed in the USA either as your wife or never married you or anyone else, you were on the hook for any costs to the state or federal government for her (or his) medical bills, housing, food, support, whatever. The USA Government was not interested in somebody being brought to the country and plopped down on the street for other taxpayers to foot the bills to support until they either became a U.S. citizen or get deported.
And I don't recall there being any 10 year time limit on your financial responsibilities in those days. It stretched until and if she became a USA Citizen. Then she was on her own in terms of financial responsibility.
If she didn't marry you but married someone else in the USA, "tag", he was now IT and assumed the responsibility until and if she became a USA Citizen.
Again, that was a couple of decades ago. Maybe it has changed since then. But I would proceed as though that is the way it still is unless I see it spelled out otherwise in clear and plain language on those visa sponsor forms I would be signing.