Definitely the 5 bacon cheeseburgers. That's one for breakfast, two for lunch, and two for dinner. I could definitely eat like that.
The picture OP shows looks like a typical fast food joint burger. And if we look at McDonald's own self-reporting of calorie content, they list a bacon cheeseburger as 330 calories. So the math of "5 bacon cheeseburgers = ~1750 calories" checks out.
The problem is, I think McDonald's is lying. 1800 calories is about my break-even rate. I don't lose or gain weight at 1800. But--though I'm a little ashamed to admit--I have eaten 5 such cheeseburgers a day (and really just the cheeseburgers, no fries and soda, I actually find them gross), and I gained weight rapidly.
That suggests to me that each of those cheeseburgers is much more than 330 calories. I'd not be surprised if--without bacon--they were actually 500 calories. 2500 calories a day, minus 1800 basal metabolic rate equals 4900 extra calories a week. If we go with the received wisdom of 3600 calories per pound of weight, that's gaining 5 pounds every 3 weeks.
And that tracks with my experience. My slovenly experience of eating nothing but McDonald's cheeseburgers for two months straight.