I'm betting solar steve is p***ing himself laughing right now.
True story.
Perhaps that's part of the reason your threads get locked.
We are in talks with the company in question and have quoted for this job too, so I'm saying nowt.
It's interesting though because looking at the scale of that job I can see why you need subbies. I'd have thought that that scale of work is only going to suit those short of work and I'd hazard a guess they are likely to be cheap and like Susan later regret taking on the job (reading between the lines). Therefore you need an ongoing source of cheap and usually new window cleaning subbies.
Your point about needing subcontractors is correct. The scale of one job is huge and we have multiple opportunities on the go at once. We have one site in East England to start on 4th April with 110,000 panels on. We likely will be cleaning about 180,000 in the South West simultaneously. We just can't manage all of it in house.
We don't need an ongoing source of cheap subcontractors though. Our Approved Contractors are very loyal because we pay well. Without paying well, I have no business.
If we get this 45,000 panel site, I'd look a right clown if I couldn't deliver it because I couldn't get men on it because the rate of pay was low. Plus, a novice will very likely come unstuck on a job of this scale. I mean no disrespect to the OP, but he said it could be the break he needed. It could also prove to be something that breaks him too. They are not as easy to handle as people may think.
We were called in twice towards the end of 2015 to finish jobs other people thought they could complete, but couldn't. OP, just be VERY SURE you can tackle it.