I am the one acting as Sys Ad and Network Ad for now. I have 2 staffs, both fresh grads, in Makati and 1 in Laguna (also fresh grad). I am developing/training them and hopefully they would gain enough experience to help me.
That's my plan, 2 sites will be a backup of each other in case of unforseen events.
I think I need to research more so I can make a better plan.
Your 2 primary sites offer a good setup for a data center and a BCP site. Since you are opting for an infrastructure with no Cloud systems, both primary sites should mirror its capabilities so that when one goes down, you can easily do a failover to the other site with minor disruption. You need another SysAdmin person supporting Laguna with you in Makati.
The advantage offered by an infrastructure that has a Cloud component is that you can have some of your key applications stored in AWS or Azure for easy access to offshore sites. Assuming you got all the financial support, you need to plan out your company's network architecture to support your key business objectives. It's hard building an infrastructure when management tend to be so mindful of cost. It is wiser to spend now than having to face losses later when the infrastructure collapses due to limited capability or under-spec'd network equipment/devices.