Shalena,
If the house is not pre-wired, I'd suggest a wireless system. That is what I have. A-1 Alarm installed it and they are a division of Sentry, a well known company in the US. ( I used them in my home and also in my business.)
The big advantage -beside the installation process won't makes a huge mess in your house- when you move again, you can take it with you.
It was not cheap, about DR$ 50,000. ( I know, we do not pay for the systems in the US..) The monitoring is DR$ 2100 / 3 months.
The system is backed up by battery, the siren is the only wired thing, but even that is protected.
Let me know if you need more info.
The Hun
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