I wouldn't call myself a libertarian. I was just asking questions which I rarely see brought up by advocates. If you can not answer my questions how do you expect me to give you an answer? Without details all I can see is advocates of UBI avoiding the flaws in the system when pointed out which make UBI is idealistic fantasy.
I think when renowned economists propose the idea, they have at least looked into the monetary details.
A big chunk of the money would simply come from an existing social system, only that it would be automatic thus cutting heavily on administration. (Keyword: small government
Depending on the current social system some additional money would have to be raised, usually through taxes but there are a dozen other means.
I do not see if as freedom when it requires the majority of the population to support the minority. It is dependency on government and other people's money.
The notion of ownership is an entirely cultural construct. E.g. many Indian tribes believed that one can not gain ownership of land (or water, or air).
Thus, the government, as representative of the community, could lend resources to individuals or corporations for a fee. That money would then be community money because all the people of the community gave their share of land, water and air to the company.