Should I rebuild a "good engine" to fix oil leak?

I'll clean the engine good this weekend and pay attention to where the oil is coming from. I know the valve covers are one source - but I suspect there more going on further down someplace. Unfortunately - my high pressure sprayer (Honda engine) doesn't want to start and that might get me off track to get that thing running tomorrow. I have too many gas operated gadgets that don't forgive sitting idle for too long.