Somebody asked a question about a barebones a few days
ago, and I was shocked at the price of the base unit.
It was $1100 Canadian. The problem for a home builder,
is the pricing for barebones like this is not going to
undercut the price of a laptop you can buy, so if you
were expecting a frenzy of price cutting by the suppliers
of barebones laptops, I think you can safely forget it.
And I haven't seen any of the above video cards for sale.
Yes, you can look at pictures, but may not touch

Check back in a year's time, and things may be entirely
different.
And if you wanted to get into the business, expect to have
to buy pallet-loads of stuff as a minimum order. That would
be the only way to avoid the retail markup on components,
such as those video cards above.
Now, imagine you finished your build, and battery life is
30 minutes. What do you do then ?
Paul