That pricing is better than it looks at first glance.The DeltaHawk isn't affordable- something like $90K.
$90k is actually for a turn key firewall forward installation by DeltaHawk into your experimental plane. Including prop, fuel system and electronics. True turn key install. When adding all that cost to the engine 90k is not that bad.
They're offering this installed kit for the first dozen or so engines to get some engines flying in people's planes as quick as possible