Ouch! A raised bed is going to be expensive!

We were thinking of putting a shed and some raised beds on our new allotment, and a small greenhouse and raised beds on part of our tarmac drive. Ouch! Expensive!

The shed will have to wait, the other two projects would be good to do because they will improve the
look of our property. Anyone had any experience of sourcing wood that is a bit cheaper than this?

Hubby is on the google!