Don't take this as a smart alec answer, but I've always found that unless it is set up on rocks, the first couple of meditation sessions seems to do the trick.
You could get some of the slotted angle iron in the hardware store (like what you would use for hanging a garage door opener), then with just a hacksaw, make a base. It would look like the letter "H". If you put it together with some nylock nuts and vinyl washers, you could leave enough play in the connections that it could fold up for storage. Just an idea but I have personally never seen anyone do anything like this to make a groover base.