I've heard good things about their equipment, but of course I'm partial to my own designs

Photosentinel has cellular connection built-into their controller, where it's more of an add-on to ours. You can configure the DigiSnap controllers to operate on a daily schedule (actually multiple configurable schedules). I don't remember if Photosentinel does that, but I'd be surprised if they don't.
https://www.harbortronics.com/Products/ ... sePackage/We've been making systems for 10 years, and have shipped about 3500 systems for use all over the planet.
Good luck with your project.