The only way you can get past having him served by a process server, or constable is if he will sign a waiver of service. If you are not on goid terms with him it is an investment in your future to have him served. Good luck.
This answer is general information which does not establish any attorney-client relationship between the person asking a question and the person answering, or a duty to respond to ongoing questions; nor is it intended to replace competent legal assistance in the jurisdiction where the matter/issue arises or is before a Court.
Best to have personally served. You are trying to save dollars but the time involved is going to be more. Pay someone else for their time and go do something else.
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