these are nice because of scanning features. only 12 dollars on ebay. and are very responsive.
antenna types, helix underground antenna’s comming soon.
Packet Radio X.25
varriable 15 watt fm transmitter on ebay with usb connection are around 110 dollars. 5 miles semi line of sight so you might be better off using a wifi relay if you have more area to cover. wifi is good for 300 km line of sight if you have the proper hardware. li-fi or ronja also have long distance applications for more secure transmissions.
smaller fm tranmitters are under 10 dollars
packet radio networks X.25 – same thing SCADA uses.
SSTV – Slowscan TV can broadcast television over packet radio