Sorry to ran on the parade, but if it looks too good to be true.......
It looks like Sandhu's company operates by employing a couple of 'tame' Gassafes, plus lots of slave 'imported' labour to bang boilers and heating systems in for people in the Black Country who want the cheapest possible job. What we call a 'landlord's special'.
Any free leads will be from customers in other parts of The UK also expecting boilers etc at ridiculously low prices.