Bugger, missed it, but I can't really afford it anyway...
But there is another way.
You know those swivelling hooks one puts in the ceiling to suspend plants and the wife from, well they are well anchored they would have to be to hold a basket of soil and water, well, take the plants down and winch the bike up on them come bike repair time. Stability can be ained by making triangles of string in the supporting strings, the hook string to the bottom bracket and another tring to the top tube making a triangle.
I have found three ceiling hooks strategically placed with bike maintenance in mind to be about the minimum needed although if the maud likes plants as many hooks as you require.