Your machine is going to have to be very good for any one to even have a look. If I put myself in the shoes of a potential customer who wants 5, 1.5 tonne, 10, 3 tonne, 2, 8 tonne and a 10 tonne machine how many will you be able to supply? If the answer is just the last 3 then why should I do business with you? I will just get the lot from Linde or Hyster. Even if you just compete in the large truck arena you will not have the product range to compete with SMV, Kalmar etc.
I also think the aim of being in the top 6 heavy truck suppliers in 6 years is a bit steep. You have been talking about this one machine for two years and all there is to show for it is a cartoon my children could have made.
Don't get me wrong, I do wish you the best of luck with this and I hope you succeed, I am just being realistic.