At the first moment I wanted that someone else should build it but after seeing the estimated prices I know it that I will have to do it by myself. Estimated price for building and pier was set at 7.200 euros that about 8.100 dollars, for pier only they wanted 800 euros (about 900 dollars).
Honestly, looking at the estimated prices, I wasn't sure what do do, should I cry or should I laugh?
So long story in a shorter form, the local garden stuff store has also some smaller build it by yourself - garden houses and the had on stock one with the dimensions of 2,7 x 2,0 m. I wanted it a little bit bigger, about 3,5 x 3,0 m but, because the delivery time was stated to be about 4 weeks and october was at the end I had to act so I did buyed it.
Fortunately they could store it until I was ready with the pier and the other parts so I wasn't forced to store it somewhere in garden or who knows where.
After that, in the next day I started to dig the hole for the pier, At the end I sitting there having in front of me a hole with a deep of 1 m and about 80 x 80 cm wide at bottom and 50 x 50 cm at surface.
Because the construction is a light one I had to build a support frame. The entire construction is sitting on 6 cement cylinders 100 cm deep and with a diameter of 20 cm, I use this approach because, in case, the entire system can be relatively easy removed comparing with a full cement base.
Total cost including motor, motor controller, tools, spare parts, small parts, lost parts ;-) is about 2.300 -2.500 euros (2.600 - 2.800 dollars),
If someone is interested to build it, drop me a line, take care when you are mounting the roof, you have to reinforce it because it is this way separated from the main construction and it will lose stability.
For remote control I use an IP Power switch with 4 outlets and the computer is set up to power on after power loss so till I get there most of the time the PC is already waiting for the user password
The roof rolls on 6 stainless steel rolls, each capable to carry up to 200 kg,
I will keep this topic updated with further information.