VMs from these providers are always shared cores (in the affordable price tier at least). So if you think you need seven 4-core VMs, either you'll end up needing much more, because you're not getting dedicated cores, or you'll end up needing fewer resources, because you're underestimating the power you'll get from dedicated cores.
That said, my advice is to leave the flexibility of cloud for those with flexibility of budget and just get a dedicated Xeon server from Hetzner at hetzner.de/sb. Four cores / eight threads with 2 HDDs go from 29€, and with SSDs from 34€ (at the moment). That kind of box has a lot of horsepower to offer, and I'm sure you'll find a way to make that work for your project.
bryanlarsen|6 years ago
I'm not sure of your use case, but it seems likely that you'd be able to use 1-2 32GB or 1 64GB dedicated machine instead of 7 8GB machines. You can get those cheap at Hetzner or OVH or OVH's surplus site Soyoustart.com
stephenr|6 years ago