My oldest will be 2.5 when my newborn gets here… I worry that my oldest will not be needing a stroller for much longer for me to invest in a double stroller 🥲. Which are very expensive…

Next I’m considering a doona to preserve trunk space and start teaching my daughter to walk on her own… doona is also expensive I know just wanted opinions of experienced moms of 3yrolds 🤔 should I really buy a double stroller or just start training my oldest to walk beside me and move my youngest into existing stroller when the Doona becomes too small?

If you have double stroller which do you recommend.. etc?