You are obligating yourself to pay tens of thousands if not hundreds of thousands of dollars
An attorney will guide you through the paperwork from the lender. They are not there to make decisions for you, but to help you understand what your obligations will be. An attorney will look at the documentation from the Seller and make sure it has been filled out correctly, for example, that the right persons are receiving title and in the right form. The attorney is the only one in the transaction who truly only has YOUR interest at heart.
Making sure you have the right documents to address the manner in which you are taking title is critical
I have been amazed at the number of people who post questions on Avvo, from virtually every state in the union, because they bought property with a non-spouse and now that person has stopped paying the mortgage or is refusing to release their interest or is refusing to leave the property or any variation of those scenarios. Having an attorney with you at the purchase of the property can help you address concerns you might have if the parties don't stay together and the property needs to be sold or refinanced to get someone's name off of title. (See my Legal Guide for buying property with a partner).
Preventative Law is always cheaper than corrective law
Consider how much cheaper it is to work out at the gym as opposed to going through open-heart surgery. Law, in this regard, is no different than medicine. The cost of preventing problems, by having a review of documentation, interests and claims, in advance of there being problems is much cheaper than the litigation to correct the problems.