Find an industrial electrician, they can program and build a PLC to control/monitor any aspect of your grow.
Wouldn't that cost more than buying an already made system? I mean buying a system that is already designed, tested for reliability and relatively mass produced. As opposed to having somebody develop the entire system for the production of a single unit. It's just economics, a team of engineers and experts put in the development effort, set up the manufacture process for efficient mass production and sell hundreds or thousands of units = a lower price for consumer and a reliable product with warranty.
On the other hand 1 electrician putting in the same development effort to develop the same system, only to put together a single unit in a lone effort will inevitably result in an under tested, less reliable, inferior product probably without warranty.
God just imagine the labor costs, it costs like $500 just to get an air conditioner INSTALLED let alone have somebody come and design + develop a system which controls an air conditioner plus 9 other mains powered devices in a unified manner tailored for climate control of indoor gardens and allows you to monitor and control everything. Not to mention complete reservoir control and monitoring which in itself would cost thousands.
I found a system already called intelliclimate+intellidose but its too expensive. About $7000. But there might be other options coming out soon which I'm waiting for. There's one that I hear will cost about $2000 and will do everything that the $7000 system does and even better apparently. I can't wait for that, it's the kind of thing I've been waiting for. 2 grand is very reasonable for a system that does everything in your garden. I mean everything too, any piece of equipment you could buy for an indoor garden these things can control. Allowing you to turn your space into a laboratory with perfect conditions night and day all year round. All while saving you a shit load of effort. I think this kind of thing just pays for itself. I've got the money set aside, just waiting for the right system to finally emerge because right now the only option on the market is $7000. A stupid price in my opinion.