I went through Trustmark a few years ago. Didn't have any trouble back then, but their regulations may have changed since. I'd just send them an email on Thursday morning telling them how much I needed put into the account, and it was there on Friday for me to write checks.
On builder's risk, the only issue I had is my homeowners and auto policy is with Alfa. Their builder's risk wouldn't cover theft until locks were on the doors. Not sure if that is standard or not.
This post was edited on 9/16 at 12:58 pm