about internet speed support 30machine or more?

i have ready to having 30 mining eth machine in my house. and my house is far from the town the max internet speed is 4mbbs. the upload speed is 0.39mbbs and the download speed is 4mbbs . PING is 89. from speedtest google.

i have do some search on some of the people experience on every machine having 10-40kbbs per second. so if i having 30 machine is that support? or it is too bad? because i havent try yet and people say if ms more than 500 is bad and >2000ms is terrible. right now i having 5 machine and the avg is 100-1200ms depend. when first share accepted is 130 then second gpu accepted share is 3xx then next gpu 5xx. is that normal?

so did any experience miner know about this or who are using 4mbbs to mining with 30machine or more ?? please tell me and share your experience than you very much^^