But she is not twenty - something, she is nearly thirty. At this age a girl should be living alone and making her own money to pay for rent and whatsover. Hell, people marry at this age and have kids, buy appartments with mortgage (it's not as if you could easily buy a house in Sofia) and some get shot, too.
560 leva in Sofia is not enough to pay for the rent and electricity, heat, water, internet and cell phone bills. Maybe you should drop the internet at home altogether and ask all your friends to call you instead of you calling them.
1000 leva is a reasonable amount to spend a month... maybe without going out. But of course at this age you should be making at least that amount of money in Sofia. And don't forget the income tax and health/social insurance contributions that are withdrawn from your gross salary.
I assume you don't have to pay for your housing, do you?
You will fail. I challenge you :)