Those are all good questions/concerns. I clearly don't have all the answers, but from the studies that have been going on since the Nixon administration and continue to this day have all drawn the basic conclusion that UBI is absolutely do-able, and will save us money, cost less, and provide a better life/future for us all.
Some additional reading for you with many Q and A's A Guide to Basic Income: Frequently Asked Questions about UBI
Also
Check out this trailer for a documentary film called "Free lunch society"
It can be viewed here on Amazon prime video. Might be region locked if you're outside the US. Otherwise give it a watch.
I hope these answer some more questions/concerns.
Here is some additional reading beyond the links, studies, and resources I posted previously in comments on this thread.
A Guide to Basic Income: Frequently Asked Questions about UBI
How to Prevent a Great Depression — A Capital-Consumption Cycle View
Free Lunch Society <---Trailer for a documentary you all should watch. You can view it on Amazon Prime Video.