It's something I'd love to do myself. And I do have quite a bunch of spanners and tools, though more for wood and diy than car stuff. but other stuff is ahead of this in my list of "ToDos".

Total ex-VAT cost on the parts is about 130.

No way..bushes are normally just a piece of rubber or plastic that sits between two parts of a joint to take up the flex and degrade rather than the joint itself. What exactly is costing so much?