No worries.
I ended up sending him this reply... I think it sums up where I am coming from. If he is trying it on then so be it. I am not playing the game any more.
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Hi ...?...?...,
Having looked over your questions, I think regardless of whether NT are hiring a chipper or own one already they will have to cover the cost of the machinery. They just haven't highlighted the fact. If I could get my wheeled chipper in to the site I would still be charging for the use of it and the depreciation, it is all built into the costs of running the business.
Using a wood chipper is by far the most efficient and cost effective way or disposing the branches. There is no way even 2-3 of the labourers you mentioned would be able to cut, load and stack a truck in the time it would take to chip that volume of branches involved in the job. You would then have to factor in the cost of their wages, plus vehicle and then tipping fees.
As for using them as opposed to qualified experienced tree workers? The job in general has enough risks involved without increasing them. Firstly, the trees on the front boundary will require some rigging to safely get them down with the cables on one side and properties on the other. I cannot see how using less skilled people would reduce the costs as it would just take longer for the job to be completed and safety would be compromised.
Lastly, my insurance would likely refuse to pay on a claim in the event of something happening, if they knew unskilled labour was being used.
Also, looking back at your previous email it looked like you have sent the wording and proposal from Nesodden Eindoms Service to NT. Therefore I will assume NT have not costed in the extra trees we discussed.
I would prefer to do the job as a whole as discussed and quoted.
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If he goes for it then I have a job 100metres from my house. If he doesn't go for it then I will have contract climbing work earning me as much or probably more than I would get from that job. Plus the contract climbing is less stress. Either way, I will be working. No biggie.