I think when you say essentials and not mortgage most peoples costs are going to be very very similar
Yeah I think one of the biggest variations is alcohol consumption, it's an expensive habit indeed. Myself and the wife get through 6-8 bottles of wine plus a 70cl bottle of spirit each week, which is nearly half our supermarket spend some weeks.
My core costs of 8k still include luxury food, Netflix, car insurance, petrol.
8K is just for you right? If that's for you and a partner, then that's quite frugal and you may need to share some advice haha.
Having to set up a tent in the rain is grim. Especially a family sized tent!
Get one of the ones with inflatable external supports. Anything with rigid poles is a hassle even in good weather IMHO. Mine is a Eurohike Genus 400, putting it up is easy in 30 mins solo, much less with a competent helper, regardless of weather conditions. I can't recommend them enough. They don't come in huge sizes like traditional tents though.