I just finished mine. I would budget $80,000. Parts came out to about $70,000 + tools + inspection + vinyl (paint).....
I also just finished mine. I installed the Dynon single display system. Included all the options (ADS-B, Autopilot, Lighting, etc.).
$79.6K Kits (includes shipping & $4.4K Florida Use Tax)
$1.6K Other parts (fiberglass, rattle can primer, fuel tank sealer, Loctite, Koger sunshade, control stick grips, etc.)
$3.3K Tools (Isham tool kit, Cleveland Main Squeeze, Scotchbrite, bench grinder, torque wrenches, material for two EAA workbenches, etc)
$0.4K Builder's Insurance (I didn't get this until I had the engine & avionics delivered)
$0.2K Truck rental and food for helpers to move home to airport
Does not include paint job ...