Hi there,
I have my rig in a remote location (e-Eye) and I use a PrimaLuceLab Eagle 5pro to control everything, and it works really greatly. Little to add to what have been said, just check the links already mentioned, you will get a clear idea of what you need.
1. As commented, you need a fix IP, how to get it it would depend on the specific conditions of the place where you will have your rig. In my case, I only had to connect a router to the internet land at e-EyE and configurate my local network for my observatory. Lan cable directly connected to the PC. PoE connection for the survey cameras.
2. Once you have internet, you need to power your PC (Eagle) and the rest of equipment, for that I am using a box for house automatization that works with ZigBee, as I use ZigBee automatic switchers to connect the PC, mount and survey cameras. I don't use WiFi there. Here there are many other options, you can use any Lan connected relay that you could activate it through an app from your smartphone (there are many for industry or even house automatization). Or you can go with a specifically designed device for remote observatory, such as the Dragonfly from Lunatico (which is a great option). To make start the computer remotely you need to activate in the BIOS the option to start it when receives power.
3. You need a remote desktop service to access to your PC from a different location. Here also many options, from Anydesk, Chrome Remote Desk, whatever suits you better. By doing this you will have full control of the Eagle from any location, using a PC, smartphone, tablet…
A great thing about the Eagle 5pro is how much you can do with it. I can provide energy to all the equipment I am using on my rig (not to the mount, but I also could do it); it is a PC and a Power box in a very compact format. It has plenty of ports to connect everything, I never missed a thing. It is fast, and has power enough to do some processing in PixInsight (for calibration, to check whatever you want on site…). Really happy with it so far, and coupled with the Ecco2 the dew control is fantastic!
Another considerations, get a good service to transfer files, I use wetransfer (you can use whatever cloud service you want for this). I also have my equipment linked to an UPC, this helps to protect the equipment from fluctuations in the voltage of the electric grit, and in case of a blackout it allows my PC to stop the session and put the mount in parking position. I also have a cloudwatcher from Lunatico to evaluate sky conditions (basically if there are clouds or not, temperature, humidity), this is a good help to decide if you open or close your roof, and in case clouds are coming and sky is overcasted it sends a signal to the roof to close by itself after putting the mount in parking position. All-sky camera is also great, but I use the one from e-EyE directly.
I hope this can help to clarify your question. From my experience, I only can recommend you the Eagle.
CS
Obdulio