I can tell you, as someone who lived below the poverty line for more than a year with no savings to speak of, there is no experiment that can portray the reality of poverty.
The worst part of it is that your mind plays tricks on you. When you are poor, fears about getting sick and having to take an unpaid day off, or fears about missing a bill and having a late fee that you can't pay consume your thoughts every minute of every day. Every time you get sick, you fear that it is some terminal disease for which you can't afford treatment.
In poverty, there is no opportunity for mistakes or accidents. In your experiment, the pressure isn't real, because it doesn't wear away at you for months, and even if a participant fails, they just go back to their regular life afterwards.