Access: While few in number, there are still some properties that don’t have legal access – that is, a deeded access-easement, or frontage on a public road. This is what is known as “landlocked” property, and it is of considerably less value. If you see an extremely low-priced piece of land for sale, it may be a bargain, or it may just not have legal access. Curing this can be fairly simple, but don’t count on it. If it were an easy matter, it would likely already have been fixed. In most cases, legal access will require a deed from the neighbor whose land you’re crossing, and folks tend not to like to sign deeds unless they get something of significant value in return.
There always seems to be an endless pile of paperwork and a lot of legal hoops to jump through (everybody wants to protect themselves from liability, etc). While some of this documentation is certainly good practice – I've learned that when you boil it all down, closing a real estate transaction is actually a fairly simple process – especially when it's an all-cash transaction (no financing or mortgages involved).
In terms of paying off the mortgage, you’d have to work directly with the lender to make sure they get paid and that they discharge their mortgage. If you’re unsure about how the process works, then honestly – it probably is best to just work with a title company. It may cost a few hundred dollars more – but for a property like what you’re describing, that’s what I would be doing anyway (I use title companies for anything in excess of $10K). They will take all the guesswork out of this process and make it WAY easier to get the job done.
Just like any sale of real estate, a land contract should begin with a purchase agreement. This is a legal document signed by a potential buyer making an offer on the real property for sale. The purchase agreement should indicate that the offer is for a land contract, and should state the purchase price, initial cash down payment, length of the payment term, and any other terms of sale.
However, if two or more people are buying or selling the property (like a married couple, for instance), you need to pay close attention to the details and verify how they should be holding or transferring the title. Some states use slightly different terminology – but these are some of the more common ways that two people can hold the title to a property.
It depends on a number of factors, are you trying to find cash buyers for your land, what is your time frame to sell the land, and are you trying to get full market value for the property, and how much work do you want to do to sell it? Depending on your answer to those questions the method by which you decide to list and market the property is going to be different.