It sounds like a cool project, regarding the power consumption I don’t know if you have seen this document (https://communities.intel.com/docs/DOC-21892) it is about the safety and regulatory information of the device. If you take a look at page 3, right where it says DC Power are indicated the maximum values of power for the device, as well as the device with a PCIe card and other connections. I recommend you to look for a low consumption card that fulfills your project needs and not exceed those values of power.
Thank you so much for your tip,
The document explain in detail all the info that i need for now, i have only to check the power requirements regarding the mini pcie wireless module to not exceed power values.
I will provide more data as soon as have done all the technical trials.