Weeds in Coastal Hay Field - What To Do?

So, I might have the opportunity to help a neighbor of mine do something with his ~40 acre field. From what he says, its been planted with Coastal Bermudagrass 3-5 years back, but no one has managed it or cut it since. He says there are some weeds in it, but thinks that if we cut it in the very near future, the coastal will grow up again and we should be able to bale it this year without having to worry about the existing weeds.

 

Does this sound logical?

 

At what point is it so weedy, that we'de need to plow the whole thing and replant it? If it needs to be no tilled, how would we find someone who does that around us?

 

Thanks in advance... 

Weeds in Coastal Hay Field - What To Do?