The RTL-SDR is a DTV receiver that had its driver enhanced to become a general purpose RF receiver.
A common ebay $10 USD 820T version can receive 24 MHz up to 1766 MHz with fairly good signal quality:
On a Pi3B+ one can decode mono SSB/FM/AM and so on... and building gnu Radio custom decoders is fairly easy.
In my part of ITU region 2, the 902 MHz to 928 MHz area is classed general purpose ISM like wifi, but 926.365 MHz overlaps Radio Astronomy specific uses. Since it is not primarily assigned for ham use, one is expected to avoid using this part of the spectrum if possible.
You can get a patched-up version of our local club raspbian image if you want to try a working RTL driver and radio receiver application like gqrx. https://sourceforge.net/projects/microm ... spberry-pi
Depending on your country, Broadcasting on the wrong channel without the proper license can get you fined and or a jail term.
I would highly recommend getting involved with your local community amateur radio group if you want to start building custom hardware, as they can help you understand what the local community expects from you (note a faulty transmitter is very easy to find if you know what you are doing.)
Ubiquiti Networks also makes inexpensive long-range networking hardware, and should have all the right licensing stamps if purchased locally.