any screening you do on basic income recipients totally invalidates the point of studying basic income (and basic income itself), beyond some really basic stuff. my suggestion : pick a town / neighborhood / whatever at random (preferably relatively poor with a population between 500-1000) and give everyone living in it at the time $1k/month over the next 5 years (even if they move). i think it's safe / wise to exclude anyone who's retired or on disability since that defeats the purpose of the experiment as they already receive entitlement funds. how you handle children i have no idea. maybe parents should get a reduced amount per child?
in other words, if you have qualifications like "poor and motivated", or even just "poor", then the basic income experiment is really a grant program. it's really important philosophically that you DON'T NEED TO DO ANYTHING to get basic income. most work is NOT VALUABLE. society is better off with more people being "lazy" and doing whatever they feel like, especially as automation increases in prevalence and importance. if 50% of people on basic income decide not to work, that's fine because the other 50% will be perfectly capable of doing everything that actually needs to get done, particularly with the safety net of not having to worry about failure quite so much.