Can a vendor have child records?

I have a use case where we have 9 different utility (ie electric gas, etc) accounts. I've tried to print just one check with multiple payments to different accounts referenced on the stub and send it via bill pay.

The problem is, the person on the receiving end usually enters the total amount without looking at the check stub that references all the accounts being paid. This results in overdue balances on most accounts, and a credit on one.

I thought of creating one master vendor called "Utility Company X" and then sub vendors (children vendors) called Utility X Location A, B, etc. Then I'd enter bills for each location and be able to take advantage of bill pay to have the checks print for each one (ie multiple checks).