oooh definitely a toughy.
I'm not sure if Pak (or the country they r in) is advanced enuf yet that employers would provide daycare services like they do in North America.
Since child is a preschooler i'm assuming she/he does not go to skool full time. i'm not sure if changing employment wud b the best idea bcuz wat if she does not like the new environment or work or wat if the place is not happy with the mother's performance and given the economic stance it's probably best to keep the job she has unless a really promising opprtunity comes her way.
sometimes i think in pak there r sum skools which keep the child in skool fultime even if it's preskool. mayb she can look into tat option.
best of luck to ur friend.