the big thing to bear inmind here is the quality of the phantom kit, how many kits do you know of that come out to production car quality, none of this has been cheap, there are a LOT of custom parts on the car, where as a lot of kits depend of the donor cars heavily.
Also the kit price includes a lot of stuff you would normally expect to source yourself.
I do think its worth every penny.
As for the virago, yes it will cost approx 50k, but it will also be substationally different to the phantom, only some of the body shape will remain the same, engine, chassis, running gear, interior, some exterior, is all planned to change