Yeah, he definitely would have called me to help him figure it out. I'd have told him:
1) Wait until Friday, sign up for a free 7-day trial, then cancel on Sunday ... and/or
2) If you can't find a coupon or a link for a free trial, stop being such a tight-ass and spend the $5.99 for a monthly service. Cancel it when you & yore lovely bride have watched the shows you want to see.
LHR
edited to add: There is an annual promo for $40 currently running. During "black friday", Peacock usually runs an annual $20 promo, but that's somewhat useless information right now - sorry.
Create or use an expired Peacock account and go to
https://www.peacocktv.com/checkout?. The promo code is BIGTENFAN.