Sounds pretty bad. I'm sure if the PH is down to 4.5 you are going to find that you need a lot of fertilizer also and it isn't cheap either.

I would start chatting up some of the local farmers and see if they would be willing to run a load for you for about 1/2 what you would otherwise be paying the distributor. They would probably think that was easy money and you would be getting a big discount over what you would have to pay the distributor.

I need to get some soil samples pulled on my land and see what kind of shape it is in.