Fantastic on your launch into ham radio.
If you were able to get a bare board, I doubt you could easily purchase the components for less than a completed board. The board is arranged for automated surface mount assembly. Its a pretty big effort to lay out your own board.
Some folk do a bitx using Manhattan construction. Challenge is sourcing all the parts.
Another rig called the QSX will eventually be available from qrplabs, if you wish to assemble a rig.
I suggest first building something simple, maybe a receiver before undertaking a complex transceiver.