Libertarian - you are at liberty to do what you want with your money
Socialist - other people are at liberty to do what they want with y0ur money
Mutually Exclusive Philosophies...
As I mentioned above, I think there are translation difficulties between UK and US in these words.
Libertarianism: living and let living, including having control of one's own money.
Socialism: working together, including pooling resources and products in mutual ownership and protection of the producer/worker.
Libertarian socialism: living one's own life and recognising that, as Homo sapiens is a social animal and that social association and structures can facilitate personal freedom, it can be personally useful in the short and/or long term to join in voluntary associations for certain activities, including protecting the members of the associations from harm by large organisations seeking to control in order to exploit.
A small-scale example: for ages, friends of mine with some good cider apple trees couldn't afford decent-sized kit and so laboriously pressed juice in small batches. They met some locals in the same position, pooled funds and got decent kit that they co-own. The kit goes round the small orchards and everyone helps out on pressing days. Sensible individuals deciding to share a specific item and activity and gaining faster, easier, more convivial pressings and, of course, both their own cider and swaps.
If you think that another term fits this theory and practice better than 'libertarian socialism' then I'd be interested to hear it, but please do me the courtesy of accepting my words at face value rather than ignoring or rejecting everything simply because of a difference in our understandings of one word.