We've got a baby hammock aswell for bub's first few months and then bub will go into the cot when we're ready and bubs is ready..... the cot at the moment just seems waaaay big for a tiny teeny newborn!

As for your idea, not my cup of tea either sorry it doesn't sound totally safe iykwim?! Babies can start crawling after only a few months old and you never know what sort of dangers that can lead to....Beds are for bigger kids i feel anyway.