Doug,This is about as cheap as you're going to get. I'm installing this in my Hiperbipe.
UAVIONIX BUNDLE ECHOUAT WITH SKYFYX-EXT ALL-IN-ONE RECEIVER Included with the echoUAT+SkyFYX-EXT bundlewww.aircraftspruce.com
A Stratux only gives you ADS-B IN. It doesn't give you ADS-B OUT.Would a Stratux be a good solution cost wise?
Trig tt22 is a small head transponder and they offer a adsb bundle package for under $3,000.00. If you dont already have a transponder.It would be nice if there was a DIY solution for ADS-B out. There is for ADS-B IN. All this stuff costs as much as a used engine.