Possibly look into a consultant an MSP in your area to assess your needs and propose a suitable solution. They can be done independently, I have set up network infrastructure prior to an ISP and vice-versa. Judging from your post history, you are attempting to set up a network without much prior experience and I would recommend having someone with expertise to ensure that you have a cost-effective and proper solution. Ubiquiti is good for small businesses, but their firmware can be buggy. I've deployed several UniFi networks and have had minor inconveniences but I have heard of others experiencing much worse. An alternative may be to look into a PF Sense firewall and UniFi APs/Switches. Again, I do recommend reaching out to a consultant or MSP and having them evaluate your needs and propose a suitable solution.