Should one risk raising a child in a non-Muslim environment, or return to a country where lawful job opportunities are unavailable, which might lead to dealing with forbidden things?

Working as an accountant in a company whose activity is permissible is not objectionable. However, raising children and protecting oneself and family from sins is a legitimate objective that cannot be equated with worldly gain. It is incumbent to migrate to a country where a Muslim can fear Allah; "And whoever fears Allah - He will make for him a way out And will provide for him from whence he does not expect." Therefore, seek Allah's guidance and move with your family to an Islamic country where you can raise your children upon Islamic creed and morals.