Hi Jeff,
I assume you have looked at the Brumby info on the Aircraft section of this site? If not then that would be a good starting place.
Also you could contact a couple of guys on here who have flown or own Brumbys - Andrew1975, and Stevron. There may be others too - just do a forum search with the keyword Brumby.
BTW there was an article about the Brumby factory at the end of the current Australian Flying magazine which may be worth a read.
They sound like a nice aircraft, well built, and locally made, so I hope you may choose to buy one and support local industry!
HTH
Cheers
Neil