There's nothing wrong with Mesos on 4 hosts, though... Anything more than a single host requires additional co-ordination - picking Mesos is mostly no differen

There's nothing wrong with Mesos on 4 hosts, though... Anything more than a single host requires additional co-ordination - picking Mesos is mostly no different than rolling alternate methods for doing so. It's not choice with the least overhead, but it's a possibility, for those for whom it has the right conveniences...