1gb RAM is a little low for botting... to give you an idea, one of my servers is a 2vcore 4gbRAM system(which is pittance really) can only do about 14 threads and average about 5k-10k streams (depending on settings) in 24 hours. So with 1gb ram, its not a linear correlation, but you can safely divide that by 4, which is 1.25k-2.5k streams a day. Thats about 3 threads (each needing its own proxy). So for 60 vps's, do the math. 60X3 = 180 threads...hmmmm thats quite a lot. If you dont bother with proxies and use just one thread each, thats 60 threads...still reasonable....will get you 21k- 42k streams a day. multiply that times 30 days is 600k- 1.2m streams a month. Not too bad, considering its using resources lying fallow.
However, running and managing 60-70 servers is a logistical nightmare, not to talk about the costs of licensing bots for that many servers.