I'm sorry that people chose not to answer your questions and also give terrible advice, only joking. Mostly correct info from Robert. just none of that Mbps vs MBps really matters. His ping is mostly decided by the ISP and both download and upload are relatively important. This can get complicated and I don't think it's worth talking about before he has tested the network and hardware. Also your info is really geared towards data transfers like downloading movies. For gaming your connection speeds are okay but not great as the upload speed is important as well.
Okay so best I can do to help with very little into about devices connecting to the nodes also quantity of clients on the network.
What models does your ISP offer? Whatever...