Hi @Nathaniel Smith you should definitely find a lawyer who focuses on real estate and is familiar with wholesaling. You should ask them if they have done wholesale deals before and represented different buyers, sellers and wholesalers. Ask if they have done straight assignments or double closings and if they have a preference. Utilizing these few questions would give you a good idea of their experience. Good luck!
I know you asked about questions for a lawyer, and definitely, find one experienced with wholesaling. Check with your local Meetups or REIAs (Real Estate Investor Associations) for referrals for a good attorney. On another note, here is (are?) my two cents worth...I would focus heavily on building your buyer's list. Find out where people want properties and the type and price range they want. Then try to find deals meeting those guidelines. Work it backward, vs. finding properties and then trying to find a buyer.