With the sena 30k its says virtually limitless people I can connect so how many people can i connect I have a 6 person team and the ones on tree stuff say I can only connect 4 people max

The 30K units use a mesh network so there is actually no limit to how many people can be on and listen.  It does however only allow 6 people to be talking at the same time.  This limits the background noise going through everyone's coms.  There is also a cool feature with the press of a button to turn your mic off.  So if you got  couple ground guys running the chipper you can have them mute their mics so that hum doesn't go through the coms.  But at the same time they can hear you in the event you need to get one of their attentions.