Open Question: Where can I file cheaply for bankruptcy Chapter 7 in Los Angeles.?

This is 2nd time in 10 yrs. that I may be forced to file for Chapter 7 in Los Angeles. I am senior disabled on benefits, so limited income. Last time I did it for under $200 with a paralegal. My question is where can I file for bankruptcy Chapter 7 w/limited income & a senior ? Also, because of new rules, will I get charge off for all my debts. I only have credit card debts, no personal or loans, do not own property or car, assets, etc. probably totaling no more than $25,000 or at least under $30,000. I am in Los Angeles, H'wood, California 90029-90028 zip code, thank u.