Any ideas to decrease an oil leak? Ford wanted 3500 to reseal the entire engine?

I changed the PCV valve, the original was fine but it only cost $2 so why not, but ford said that it was leaking from every where. (i'm still thinking lazy mechanic)

Insufficient information (speaking of lazy). What year / model / type engine? Other leaks besides PCV? Valve covers? Oil Pan? Timing cover? Front & Rear seals? Power steering pump? Transmission? Rear end?

That was the classic "lets get rid of the this guy with a ridiculous quote" answer. They don't want to do the work, brake jobs are easier and make more money.
Take it to a local independent shop and ask if they can give you an estimate for the major leak.

Hi simple things take tim to learn even for a lazy guy.