As an agent with 10+ years experience I would suggest that there is a proper point to hire an escrow co-ordinator. Most co-ordinators regardless of skill charge between $300-$400 per escrow. Buying business by going lower is a viable strategy but expect to lose clients as you try to increase price later.
Maybe what you could do is promote your business initially by reducing price via temporary discount. "My rate is $400 per escrow but I will charge $300 for the first year..." That way the price is already set higher and understood at the onset.