Goodness. Stay focused people. I can use input from other tactical gamers out there re the DMG formula for CR/XP budget:
First, the DMG suggests a scaling multiple of .5 if 6+ PCs. I would say the scaling multiple should be 0.25 per PC > 4. So if 7 PCs, 1.75. In effect that means if you have 7 PCs, your XP budget would be 300% what it would be if you had 4 PCs (at 1st level, 4 PCs would have a deadly budget of 4x100=400 xp, while 7 PCs would have 7x100=700x1.75=1,225).
Secondly, the DMG provides no recommendation for encounters where the PCs know they can use all their resources. I would suggest giving +40% the normal XP budget per encounter less than 7 that there was in the day. So +240% xp budget if there is only 1 encounter that day.
Those 2 modifications seem to together square with my experience. For instance, 7x L10 PCs killed a Kraken (CR23, 50k exp) in what the DMG would consider to be a "hard" encounter, but the PCs knew it would be the only encounter of the day and were fresh off a long rest. Based on the DMG and my adjustments, the XP budget would be 7x1900=13.3k, x1.75 for 7 PCs=23.3k, x2.25 for a 1-shot encounter=52.4k exp.
btw the Daily adventuring budget guidelines seem useful only in balancing easy/med./hard encounters, not in significantly reducing the number of encounters per day and spending more per encounter. In other words, a party facing only 1 encounter and able to use all its resources still cant handle 6-8 times the xp budget.