Orangeberg was a joke 60 plus years ago when they put it in the ground. Plan on total replacement.
Your options are:
Pipe lining i.e. reflow or other cure in place pipe (CIPP) dont work with colapsed, deformed, offset, or other major failures. It is really only good cracked or leaking joints. So it is a bad option for Orangeburg. That leaves pipe bursting, directional drilling, or treching in a new line.
The real question is if the park will support it and what will your return be after you put 100 to 400k in cap ex. If not it just becomes one more park that will die due to failing infrastructure. The math on dropping massive capex up front demands massive discount in price, owner financing, and low or no downpayment unless your talking about a beach front property.