Well, today is probably a good day for a major update. Today, I bought two pieces of wood, it's not enough for the whole cabinet, but enough to get the sides done and some offcuts. The 2 pieces were 2400mm x 1200mm (12mm thick) MDF - it's very solid and will be great for the sides.
I only decided to get 2 due to money issue again as few hours before this - I also managed to pick up a 21" IBM CRT screen for $25.