If burglars want to enter your premises they most certainly will and despite cameras etc etc they will make entry quickly and with remarkable ease. They have no regard for entering cleanly and without damage. Remember that determined thieves will ram raid premised, use explosives, use chainsaws or any other means of gaining entry. The best that you can achieve will be to slow them down a little. Lights, cameras, sirens etc are generally easily avoided or put out of action. Do not kid yourself that you have created a burglar proof home.
As a reminder just remember the strong room robbery that took place in London a couple of years ago.......now that was a building actually designed to keep the bad guys out, but they still got in.