1250 ETHO/month for 30000 coin node.

We currently don't support Windows nodes due to instability and security problems when exposing it to the internet.
You will definitely need a fairly static IP address to run a node because all the checks rely on the IP address not changing.  You can certainly run on a changing IP address but you will need to redo the registration every time your IP address changes. I would not advise running the 30000 node on a consumer connection because of the high bandwidth utilization.