Closing on a Wholesale Deal.....Please Explain

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Good morning,

Please forgive me if the question may sound a little naive, but I'm new to this and need some things cleared up. Once a home is under contract for a wholesale deal, do I need to find an attorney or a title company to close on the home? Does it matter if I choose a title co. or the attorney? I'm assuming there will be closing costs, who would be responsible for these,my seller or the the buyer? Thanks!