Quick plug for 3 QBs - as a Jordan Love owner, I'm glad I also rostered Goff and Stafford this year. I think the 2 QB approach leaves you too shallow at such a critical position, but maybe that's just me. I'm fairly happy with my team, even though there were some serious duds, it looks like I'll survive at least another week and I like my chances to go further with 2 relatively healthy QBs remaining.
I was back and forth with QBs, but went with 2. After losing Love, I now wish I had a third QB. i went cheap for my 2nd qb and it does not look good for next week.
This is results-oriented thinking. Obviously you wish you had a 3rd QB when one or both of your first 2 gets hurt. If they don't get hurt, the 3rd QB is a waste of money.
In a contest like this you have to play it as if you're assuming your guys will stay healthy all year. If they don't, you're not going to win anyway. The team that wins the contest won't do so because they had backups for their injured studs.
I think the real QB decision in this contest isn't "should I roster 2 or 3", it's "should I roster 1 or 2?" Can make a case that it's worth the gamble to just roll with one stud with a relatively early bye and don't waste any more money at the position.