Brisbane Suburb suggestions for young family

Hi Brisbanites,
My husband and I would love to buy a home in Tasmania due to the beauty, being behind the times and the cost of being able to buy a house basically on the beach.

Unfortunately being a young family my job is too good to leave in Brisbane so its not a viable option in the near future.
Because of this we are stuck on what area to buy in, and Im starting to wonder if what we want, actually exists!? - Which is why I am posting here.

Were hoping to find a smaller suburb with a tight knit community.
Somewhere close enough to commute to Brisbane daily, also a block big enough to have our veggie gardens, shed and kids play equipment etc

Bayside or mountain ranges would be preferred and it all has to be under 450K

Any suggestions would be very much appreciated?

Thank you