Welcome!

Try ebay.  I bought my dehydrator there for under $40.  It has a temp
control, but no timer, that means I need to be home in 5 hours to turn the
thing off.

I wish I had an ostrich farm near me!  You are very lucky.  Find out if the
ostrich is fed their natural diet or are fed an artificial grain based diet.
Find out if they are free range or caged.  This would make a big difference
in their fat profile and their protein to fat ratio.

Keep us posted on your progress.
Alex