is your no1 sleeping in baby cot? if yes, you need a new one for no2. Better not put two babies in one cot.
if you are going to bottle feed no2 , you need to get new bottle coz teat size will be different from no1.
tandem stroller is not necessary to buy now.
when buying one you need to consider the places that you are going, will the lift there have space big enough for tandem stroller (some places/shopping lifts is quite small) waiting for lift is very headache.
Babywear is good and no1&no2 can take turn to sit/sleep in stroller while the other is being babywear by you.
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