and you'll need all the site routers, all the various parts and pieces. A core itself also requires expertise and setup. Unless you or someone has training at the ST level, it's not like the parts are "plug and play". Didn't mention what you intend to use for backhaul (T1/channel banks versus IP microwave, fiber, etc). And then there is that licensing issue, not talking about FCC licensing, I mean MSI. Depending on the core release is what licenses may cost if they are not included, licenses for things like NM client (you need this to setup the zone itself, activate IDs, run the PRNM suite, etc).
Not trying to shill for them, but Sunny's is about the only place second to MSI themselves who can sell you a "refurbished" turn key system where they will stage it at their facility just like MSI and then ship to you. Again, you'll still need someone local with the skill set to set it all up.
I say this from experience. Good luck with your project.