I had to move dd1 into her bed just before she turned 2 as she wrecked her cot - wee madame
I bought one of those IKEA beds which folds up at both ends and put a mesh bed guard on the side so it had no open sides iyswim?
she's been fantastic in it bless her
dd2 just turned 2 will be going into the toddler bed in a few months once dc3 arrives and outgrows moses basket - am not so sure it will go so well as she is a determined wee monster
nephew was in his till be was about 4 but they have no more kids
I think the longer the better for the sake of your sanity but if the move has to be done then it is managable