We're expecting our first baby, and our flat is quite small. I'm trying to find a cot that starts small but can be extended to a bed for maybe a 5 year old. The only one I can find is Alma Bloom Mini+ with the extension kit, which looks great, but it's so expensive! Are there any affordable, compact cots that extend as the baby grows? I can see plenty of cots which convert into child beds, but they start off big and you just remove the sides. I'm looking for one that starts off small and can be lengthened later.