???? Back up what? That homebuyers would perfer to spend 20-30% less? That kind of falls into the category the sky is blue.
Once again you are evading your claim. You said it makes no difference that the NRST is financed in the mortgage of a new home.
Back that up or give up.
Either way you are going to look like a fool.
It’s not my fault, you did it and are doing it to yourself.
Market conditions drive the price of homes, both new and used. Existing housing will not have an instant 20-30% "advantage" for lack of a better word. Around 22% of a new homes price is already embedded taxes, which would be replaced by the FairTax for a net effect on the price of zero.
And as a supposed home builder, do you price a new construction home at consistent and flat X% over cost or do you get as much as the market will pay you?