Budget:20$ ,need to have 5 years of expereince wih nodemcu and developing commercial products.
1)Need to connect to Android mobile hotspot to utilise 4G internet usage into nodemcu.
2)Need to call 2 webservices(24x7) and call a 4 relay according to API response,post value to server back again after executing,should run 24x7,should never stop till its reset.
3)Need to have nodemcu esp8266,4 relay modules ready to work.
4)You have to install on system and make sure its running properly,tested,teamviewer/anydesk if any problem.
5)Need to send code to test .Need to make this as commercial product
Should be patient during work..Have more tasks ,looking for long term.