I built mine and received the certificate to take care of it too. Not sure I could stand the cost of owning a certified plane and having someone else maintain it for me.
Clarification: You, or anyone else, may maintain as Experimental Aircraft without the Repairman Certificate. The Repairman Certificate allows you to perform and sign off the annual condition inspection.
Mel, DAR since the Last Century, Specializing in Light-Sport and Experimental Aircraft. Certificated over 1,200 Light-Sport & Experimental aircraft.