If the attorney you mentioned will assist gratis, then you are lucky. If so, use him/her.
However a statutory road association can easily be formed without legal assistance. You likely will not have a substantial bank account to start. I believe the law was set up that way. Just read Sections 3101 -3104 in detail, keep all property owners informed, follow the timing requirements and hold a formative first meeting with a well documented agenda. Remember that the majority should control any votes taken.
Also, in the future, don't be afraid of using the Notice of Claim option if necessary. It can and does work. Good Luck.