I'm sure there is a market out there, or several markets to use that volume. Problem is see is this:-

1/ large earthmoving machines are horendously expensive and the owners being 'in the dark' about SVO/WVO are going to be very reluctant to try something new. Also Mr CAT will wipe the warrantee on the fuel system/engine so this would be scary for the owners.
The other thing is they also move the machinery around and some times over long distances to whereever the contract takes them and would then source fuel from a local supplier.

2/ Transport companies would shy away from SVO/WVO unless local. For longhaul drivers supply is the problem. Yes they can fill up there but what can they then get 1,000k down the track?


But if you can find someone that used heaps of fuel locally all the time then educate/show them that SVO/WCO is an alturnative viable fuel supply I am sure your cause will gather momentum. But it is going to take hard work and time to build up to 8,000 litres/day sales.