It's a tricky one and we've been there also and about to be there again.

For us we were lucky enough to be able to borrow a cot with the first new arrival and i think we can again this time around. It worked really well for us, when the transition was made to a bed DS1 had absolutely no issues and would still wait in bed for us to come and get him (only for a short time )

I'm hoping it's as smooth for DS2

Good luck and hope it's a smooth transition.