It's hard to make money building hobbyist-level hardware and selling it to hobbyists. Selling it to commercial users is another story altogether! I can buy a 5

It's hard to make money building hobbyist-level hardware and selling it to hobbyists. Selling it to commercial users is another story altogether! I can buy a 5" 800x400 TFT color touch screen with an onboard 32-bit processor that has I2C and SPI ports that can be programmed with the Arduino IDE. And for good measure, implementing an onscreen keypad is already built into the libraries available for it. Cost is around $30 on Aliexpress. I have a couple of them and they are amazing for the price. A github project has sprung up around these devices: https://github.com/witnessmenow/ESP32-Cheap-Yellow-Display https://github.com/witnessmenow/ESP32-Cheap-Yellow-Display