A friend showed me a s5pv210 core board solution with a low price. I couldn't help but sneer. I think you will be sneer when you come in.

Core Board requirements
Kernel: arm Cortex-A8
Clock speed: 1 GHz
Support for Neon commands
Support MPEG-4/MPEG2, H.264/h263, VC-1, DivX video codec 1080p @ 30fps
Supports 2D image acceleration with a maximum resolution of 8000x8000
Supports 3D graphics acceleration (Power VR sgx540), OpenGL-1.1 & 2.0, openvg1.0
Supports SD/MMC/sdio interface memory cards, up to 32 GB
Supports JPEG hardware encoding/decoding, with a maximum resolution of 8192x8192.
• Memory: 4 GB bits DDR2
• FLASH: 2G bits slc nand flashh
• Integrated with a single-chip power management chip (PMIC), it is not difficult to buy the maxmaxmaxim power chip, but a highly configurable Wolfson Power Supply monolithic solution, you can customize the default startup voltage and DVS Power Supply Adjustment. Battery Charging of MA lithium battery (battery power test and battery temperature test)

• M Ethernet Card Integration
• Integrated with the ac97 interface hifi sound card, supports multiple audio channels and smart phone multi-channel audio connection
• Extended system bus interfaces, 16-bit bus and address lines, two-way chip selection and half-character and byte read/write Signals
• The 230-foot tqfp package comes with an independent test frame test point, and the core board user can provide the test frame according to the data volume.
Bottom Board requirements:
Onboard standard JTAG interface
• Two independent on-board Camera Interfaces
• Onboard RS232 serial port x 3,
• Onboard VGA, supporting 1024*768 resistive or capacitive touch screen or common display
• Onboard 3 USB Host 2.0 and 1 usb otg 2.0 interface
• Two sdio interfaces on the board (one SD card interface and one sdio WiFi Interface)
• Two output channels with different sound channels on the board
• One hard disk interface on board
• One on-board power switch
• One onboard network interface
• Onboard 1 reset Interface
• On-board system indicators, power indicators, Hard Drive indicators, SD card indicators, and network indicators
• Onboard 1 buzzer
• Board loading leads to all useless Io ports
Expansion Board requirements:
Four groups of gpio low-level input (including working indicator lights), four groups of gpio low-level output into the expansion Board (including working indicator lights) (discharge line into the bottom board)
RS485 serial port x 1 (including the communication indicator light) and CAN bus connected to X1 to form an expansion Board (Communication indicator light) (cables are introduced to the bottom board)
Two groups of wg26 interface extended boards (including indicator lights)
Software Fault requirements:
• System Hot Backup
• The system records events such as ON/OFF, power outages, and reboots.

Quote ~ 2.5 million. What do you think?
I think someone will do it, but I really laughed. There was another scheme like this last night, which was 8 W and s5pv210. I gave up.
Talent, the above description of this solution seems to be from realarm and my s5pv210 manual. I am familiar with it.

One of my friends is also brave enough. I have never done it myself and want to take it over. I want to know that this is not simple, and there are more than 2 W price, so don't lose the engineer's face.