(UK here) I have a large lawn (longest diagonal is 40m) and many mature trees and I also hate leaf blowers with a passion. I now have some proper rakes designed

(UK here) I have a large lawn (longest diagonal is 40m) and many mature trees and I also hate leaf blowers with a passion. I now have some proper rakes designed for leaf sweeping - approx 75cm wide. I can clear the whole area in about 90 minutes (approx once per week). I have a tall collection sack and a set of the large plastic grabs that let me pick up huge amounts in a single go. The speed trick is to avoid pickups for as long as possible, working a 'wave' of leaves across the lawn. I pick up piles from the leaf-side of the front line and don't ever try for a complete pick-up, so the ones left behind simply get raked a bit later. The collected leaves are dumped, unbagged, in a massive pile that grows throughout the collection season. In the summer I mix my grass cuttings in and in autumn (a year after the first leaves were added) I have some superb weed-free mulch. The raking also helps keep the lawn in good condition. Every few months my old petrol leaf blower is used for about 30 mins to clear debris off a gravel path that has proven impossible to rake, and when this blower dies I'll get a battery one.