@Logicfest -- well, they get expensive in some circumstances. For example, if the land is located outside of the city limits then it is usually up to the county judge to decide if an easement by necessity exists. The person asking for that determination can usually file with the county court for free or for a very low cost and the judge will decide the case. That decision can be appealed.
Of course, if the land is located within the city limits, then circuit courts are where those issues are decided and that is where lawyers and legal expenses come into play.
A good rule of thumb is to check on access before a parcel of land is purchased. If there is no access, make sure an easement by necessity is clearly defined in the sale.