Engine Performance problem
2002 Saturn L300 6 cyl Front Wheel Drive Automatic 78,000 miles

My car will not start sometimes. Mostly after it has been on the road and the engine is hot, if I turn it off, go inside for not even 10 minutes, it will not start without giving it Starter Fluid, then it starts right up. I had it diagnosed and it was for the PO123 and PO122 as well as the Crankshaft sensor. In reading much material about sensors. Which sensor would be the "better" one to replace first? My friend, who diagnosed, said one sensor could be messing up the other sensors? These are all very costly sensors, would like to just replace 1 or 2 if I could. Any suggestions on what to do first? Thank you for any advice.

Hi, I would replace the crankshaft sensor first