Ha! It's taken us 17 years to get him to this stage to help us

. In fact we are trying a new system too - a bit late for you for this year but worth considering next year - Help Exchange
www.helpx.net . This is for people who want to travel the world but to stay in family homes instead of hostels - in return for food and a bed they will work about 30 or 35 hours a week, with the rest of the time to themselves to explore. We have our second helpxer here at the moment, a very pleasant lad from Bulgaria who will be starting on the seedling thistles the grandson missed tomorrow. There's wwoofs too.
Meanwhile OH and I have been tackling the giant thistles which have appeared as if from nowhere in the veg patch while we were away at the Highland Show

All creeping thistles so you think you have pulled the whole root but about a foot down there is a vast horizontal network of permanent roots which will continue putting up shoots until winter. Ah well, it's worth it for the delicious food we grow

Good luck with your clearing.