Hi
your post made me chuckle ....
You can buy extra trays (the old black ecowormery is obsolete but we do have the trays for it still in stock)
http://www.wormcity.co.uk/shop/ecoworme ... -p-36.html
but we generally don't advise adding more than 3 extra...
or as you point out you can start a new wormery completly - its totally your choice on space and budget....
best of luck with your decision
Ronnie