Titan's heaters cost from $230 to $860. I am sure there would be a price range for WDRP's product as well.
The point is .. Titan is already IN The Market.
WDRP doesn't even have a unit fully tested yet. WDRP has no marketing presence. WDRP doesn't even know the efficiency of its basic unit. WDRP doesn't even know the cost of manufacture of its basic unit. jmo