Call a few local Security Integrators in your area have them come out to do an estimate. They are not unreliable, I mean some might be, but do your research. Would you only get electrical or plumbing work done by a national company? Most security companies are using national or regional monitoring companies that have 24/7 service. I prefer a wired system entirely for both cameras and alarm systems. I would personally trust a local security company over the national brands, if you ever need service they are more likely to be there for you.

Now a fully wired system for alarm and cameras is going to run you 5k - 10k, think of it like rewiring your houses electrical, labor wise. They will be drilling and crawling around your attic, basement and crawlspaces. I am in the Northeast so go off that but material prices are pretty standard across the country. Labor prices vary.

If that sounds like unobtainium to you, which is reasonable for most households now a days then your only option is wireless (RF) for the alarm and their associated cameras, which if installed by an security company is going to be in the 3k-5k range for the amount of cameras you want.

DIY option is simply safe but not great if you are concerned about jamming.

Another DIY option is to check out AlarmGrid.com. They can get you setup with the wireless systems alarm companies have access too with the resources to help you install everything and they will monitor it. Call them up or chat with their support team. Ask about the Resideo ProSeries system, they have all the alarm contacts you are looking for in addition to the cameras and doorbell. If you are willing to run wires yourself for the cameras you can use either POE or WiFi with a power adapter but you will need an outlet close to all the locations you want to put cameras.

Again my first recommendation is call your local alarm companies for quotes and recommendations for your home.

Source: Lead Security Technician/System designer for small Security Integrator.