Darn!! It's a bit too far for me to travel from Scotland. I take it that Bermuda grass is quite invasive though if it's covering two acres so maybe it's just as well I don't live near you.
I will offer the same deal catspower.It is a great grass and makes great lawn.Try digging it from flower beds oh my invasive isn't the word.It can be completely dead and revive over night.
No way to kill it. If you try, you just make it mad and it comes back twice as thick. Same with Cypress vine.