Daisy chaining switches is a bad idea (as each switch only has the bandwidth of the port that is daisy chained, so the last switch will have say 100/1000mbit to the switch previous in line, and that switch will only have 100/1000mbit to the previous switch and so on), unless they mean stacking but even then without management your going to get a similar situation.

Though since its only VoIP traffic which isn't very bandwidth intensive (compared to other data traffic, such as windows network/email).

I would recommend a core switch with the others "hanging off it", ideally managed switches so that ports can be configured as stacking ports.