We have just bought two 100litre containers that had food additives in them, they have a aluminium cage, some have a gal steel cage.
Cut the cage in hal then cut the container in half and give them a good pressure washing to get the gunk out.
They then drop back in the cage and you have raised beds.
We are going for the wicking self watering type beds and will start in a couple of weeks when I have some time up my sleeve.
They cost $50 each which is a lot cheaper than buying a bed, we will put a timber frame around it when it is done to make it look decent and wrap some copper wire around the containers to keep the snails out.
This video gives you the idea but a bit long winded:
How To Build A Wicking Bed Using an IBC / Tote - YouTube
This will be our vegetable garden that we will put some hoops over and cover with shade cloth so it doesn't cook in summer.
Apparently when slugs try to crawl over copper wire the slime reacts with the copper and gives them a shock and they fall off, we get sick of snails eating everything we plant and this could be the answer.
We have done corn before and we made a maze in the garden with it to amuse the kids when they were young, bonus was they could push through it and eat it when it was ready.
Snails didn't attack the corn but they love herbs and strawberries and my basil crop never ever made it.