In reply to KierenBannon:
So simple to build. Loads of information online.
I built a free standing campus board which was collapsible to put behind the sofa in our first rented flat.
I built my first board in a spare upstairs bedroom of a rented house. Free standing. Three sheets of ply with a slither taken off one and used as a kicker. Used 8x2s for the vertical leg supports. Went for 45° to maximize height / length of board.
Moved house, rebuilt the board in a garage. Again it was free standing with leg supports as it was a rented property. The garage was roomier so we could go higher and put it at 40°.
Bought a house, moved the board again, built it in the garage of the house we bought. This garage was lower so we went for 55°. Also as we owned the house I built it into the garage. Went off various plans I found online for this. Moon, metolus etc.
We moved again and got a house with no garage. This time I wanted a full sized moon board as we are close to rocks but further from climbing walls. Worked on a design with a couple fo engineer friends and a YouTube garden room series. Used all that to draw out plans for a triangular insulated wooden building. Put the panels from the old 55° to use on one side at 20° and bought all new for a 40° moonboard on the other side. Got holds second hand. Second hand widows and door etc.
Each iteration has improved my confidence and knowledge. It isn't difficult. Measure twice once. Plan it ahead. Read up on the moon site, the metolius site and probably a tonne more.
I'd fully recommend doing it yourself. The wood will cost £500 ish. Holds second hand or self made. And it's much more rewarding. Also means you have the skills to move it when / if you move house in the future or go further and improve on it.