Im new and im wondering does it work in colombia and do i need hotspot or wifi in my tractor
It works world wide.
You do not need a hotspot or wifi in your tractor. For RTK you need some kind of communication from the base station to the tractor, you can do it with internet or you can do it with radio modules.
Since you’re new - there is too much information to absorb at once. Best is just to read along for awhile. In addition to reading here on discourse you can also read on the Telegram groups
There is an International Telegram group here with daily discussions: Telegram: Contact @agopengpsinternational
There is also a Spanish group: Telegram: Contact @AgOpenGPS_Spanish
Success stories group: Telegram: Contact @Agopenerfolge
Is there a plug and play autosteer box or do i have to build my own
About as close as you’ll get to plug-and-play