How to get building materials to a difficult to access site?
I suggest a temporary wooden track and a heavy cart, with a winch at one end and a pulley at the other.



You'll need to make about 525 to 530 meters of temporary track.



Build the track to accommodate the width of the cart wheels. This picture is only a suggestion; you should make the track out of material that can be re-used in your renovation if possible.

You'll need about 1050 meters of rope.

Build the track from the road end, and use the cart to transport track material to the unfinished end. Once the track is laid, the first load over it should be the winch. Depending on its design, the winch might be able to pull itself up the slope to the site.

The winch can be rented, probably at the same place where you get the cement mixer. They may be able to rent you the rope too.