Certainly an impressive machine, however, the lads I use for taking my cut trees away, will tarmac my drive and give me some lucky heather

But will they pay you for the privilege?!...
It is all madness though - that machine is kept busy chipping for biomass all over the country, which is an industry entirely propped up by government RHI handouts. The chip produced will be dried and sold to people who burn it in boilers to provide heat for their houses/businesses, but the users predominantly only do that instead of using gas etc as they are paid to run those boilers (and the payments are so good that they make decent income from it).
The ‘buying woodchip/drying woodchip/selling woodchip’ is run as a business in its own right, but the real money from that aspect of the job comes from the RHI payments generated by the woodchip boiler that is used to dry the chip in the first place... As long as the boilers are running money is being earned - it’s not particularly green if you have a look at the big picture (but it has made and continues to make some serious money for those involved).