If I had the money 
I’d run the same sensors the NWS runs. i.e Vaisala or R.M. Young. 
But the price for that gear is several times that of the Davis equipment. 
Yikes! I can see why you went the route you did.
The cost in USD for the Vantage2 ranges from 624 to 1380, which isn’t what I’d call affordable,
but is still considerably less than the >2k AUD you mentioned.
Nice!
Very nice!