I got a small one and have used it twice, I have three full-size ones and rarely use more than one at a time but, you never know!
As far as minion method, I had a small ignition failure one time and pulled out my torch to fire one side (I like the side ignition method) and gave it about three minutes or less, nice side start. I’ve been sold on that technique since. Fill the ring, torch the side, and Bob’s your uncle!
The side lit thing was shared with me by TonyUK who got it from the esteemed Enrico Brandizzi, I think it’s worth trying, it works great for me.
BTW, I’d consider an 18” if you plan on any party’s, you can put a small amount on a bigger grill but, it’s really to put a bigger thing on a postage stamp. My opinion of course.