I'm working on something that would or could fit-the-bill. It uses the Arduino D1 board which could monitor a number of doors or devices. When triggered it would do a number of things which include, sending an SMS message, Sending an email and actually phoning you as well. All programming would be done for you or you could download a script and load that into the board yourself. It's being designed for RV/Caravans to protect them whilst in storage (No power) or whilst the owners are exploring the holiday area. You would simply connect whatever sensors you want, Door contacts, Break beams, CCTV cameras etc. When a basic sensor is triggered, power is then supplied to all of the other kit.