Bloggs, it's not the initial outlay, it's the upkeep. The sats are already up there.
I wish that were true, but I'm pretty certain it isn't..
The SBAS payload, if installed on an existing geostationary satellite mission is estimated at $30M. CASA is currently investigating
alternatives. For a short time in 2010/11, there was an opportunity for Australia to install an SBAS payload on the NBN satellites for $30M. New secondary payload opportunities must now be identified. Possibilities include Inmarsat.
Source:
http://www.spaceindustry.com.au/Docu...20-%20SBAS.pdf
(Prof. Andrew Dempster, UNSW) 2015