Are you getting a time out error or a Google error? SLP does not have a maximum amount you can load. The big issues are caused by 1) your host/ server limitations (if you are on a shared server) 2) Google Query limitations (and if you are on a shared server every query to the Google Maps API counts not just yours) and 3) Configutration
From first glance, your csv file looks ok. See Troubleshooting for common issues and look under the documentation on the page below for the section “Large List Imports:
Import suggestions
Could you provide your Plugin Environment and site url when you are posting in the forums please.