Karen: maybe this will help
This might give you some ideas:
You can buy one fairly inexpensively as well.
My husband made one out of a piece of metal fencing, supported by two wooden triangles. We had company all last week and that rack came in handy.
Take a shipping pallet, upright and cut the boards according to where the bikes are not touching each other. Build a stand with an additional pallet.
hometalk has some ideas!