I feel your pain OP.
I’m on the last day of our patio replacement. 40m2 dug out by hand to 200mm and barrowed off site into skip, 100mm MOT1 to replace, whackered down, 60mm lean concrete mixed and barrowed and wackered, sub base SBR slurry, then 900x600x20 porcelain slabs bedded on 5:1 with SBR add mix all mixed on site in small rear yard.
I reckon if you add the 16 oak sleepers I built the raised areas with, I’ve handled around 50t of materials. Due to delivery cock-up, I had to fetch and handball everything. Luckily I have a trailer so the quarry could drop the gear straight from the dozer. I do also have a mixer and a vacuum lifter, you don’t want to be mixing much by hand in a barrow, it soon wears thin.
It’s been a good week of hard graft and I’d like to say I slept well at night, but it was mostly thinking about calculations for materials and how I was going to problem solve! Luckily the weather has been fairly kind for the laying part, as it was pissing down whilst I was digging out.