If you are going to buy an S5 go ahead and get the lens. It will cost you $300 more (USA) but you'll be able to re-sell it for between $400 and $450. It's a smart play. Just make sure you have a market for. But I'm going to suggest that if you test it first you probably won't want to sell it. It's a nice, workman-like tool.
I'm happy my impulsive nature won out on this one. Happy New Year.
P.S. Just remember, it was a 2020 purchase. It doesn't count in any gear churn for 2021.