I have also written a theory about basic income:
https://steemit.com/money/@profitgenerator/in-defense-of-inflation-and-basic-income
I think its doable in a pretty libertarian way, it might be a good short term solution to get people out of poverty, but I would not advocate it for long term. For long term solutions we should try a free economy.
how can that be considered libertarian?
Penn Gilette did a video about Libertarianism on Youtube Big Think and it's really interesting. He talks about UBI in it.
Because it involves less government than the current monetary system. Libertarians are minarchists not anarchists, so for little government I think my implementation of the BI theory would be the best one.