Or you could buy a copy, ready-made in the factory in China:
https://www.aliexpress.com/item/RS-918-10WATT-HF-SDR-Transceiver-RX-1-8-30MHz-TX-All-HAM-HF-BANDS-SSB/32827781026.html
https://www.aliexpress.com/item/RS-918-10WATT-HF-SDR-Transceiver-RX-1-8-30MHz-TX-All-HAM-HF-BANDS-SSB/32827781026.html