Potentially losing your job would be part of the risk/sacrifice a potential candidate would have to accept. Yes, it would be difficult for someone living paycheck to paycheck to do this. Ideally, election reform like this would go hand in hand with economic reform that leads us to a society in which much less people are living paycheck to paycheck. This could happen easily if we start electing real people instead of rich people only.
And how are poor people supposed to afford that joy when we can barely afford to keep ourselves housed/clothed/fed?