Nice looking S2000. I was debating one before getting one of the Dodge snakes.
I love going to Valley and have been to HRL a few times for business and otherwise. I'm just "North" of San Antonio in Lockhart and my mechanic can help you out. Ken Smith / ken@kensmobilemechanics.com. I don't recall his rates for a 150, but I would suspect $600-$1000 depending if you make it an annual or not.
Say hi if you're ever in the area!