I have an MYT in a remote observatory 90 miles from my house which has two piers with full imaging systems on them. The observatory is off the grid which makes things just a tad more complicated. The MYT replaced an MX+ that I sold recently. So, I have a lot of experience with getting a Paramount based system working remotely. If you want help feel free at any time to PM me. Here are some basic answers that may be helpful.
1. SGP cannot use TPoint but you can build a TPoint model one time (in a permanent setup) so that any other SGP supported platesolver will work just fine for you. You will need the ASCOM X2 driver that's on the Bisque website for SGP to control the mount. That will also let you use the SKYX as a Planetarium (which is terrific once you climb up the learning curve).
2. ASCOM is the glue that holds things together. You're buying a very expensive computer but you will still have to load the ASCOM platform on it. So, that's the first step in getting everything running. There are ascom drivers for pretty much anything you need to control including the MAXDome II. I have not used SGP to control my roof so, you need to read the manual.
3. You really also want a weather system that integrates with the roof or that will at least allow the roof to be automatically closed if the weather turns bad. Otherwise you will need to be very careful and stay up late somtimes to get all the possible clear SKY time.
4. You can operate any Paramount through a iPad if the mount has the WiSky adapter installed. Ask SB about that - you buy the board and just install it, it's easy. Then you load the SKYX onto the iPad.
5. For remote access to the Eagle you need either to use something like Windows Remote Desktop if you are on a LAN or TeamViewer/AnyDesk if you are on a WAN. These also run on a tablet. I use a dedicated cheap laptop in addition to my imaging computers to control the roof and the weather system. I do not want to have my imaging computer crash and have no other way to secure the observatory.
6. You will also need a digital logger in addition to the power switching on the Eagle. You want to be able to turn things on and off rermotely and the digital logger is an industrial quality device. I have three of these in my observatory. One is use strictly to control the observatory utilities - roof, router, internet access, obsevatory cameras, etc. Then each of my two imaging systems has it's own logger.
7. With a dome, you should not have any worry about the scope hitting the roof, but I always warn people to avoid setting up a system that would allow that to happen.
8. You want a UPS for both the roof and the imaging system so that you can close things down if you lose power. My roof system is set to close if the internet is lost for 10 minutes, the computer that controls is fails, or the weather gets dicey (even cloudy is enough).
I'm sure that there are plenty of videos about all this. I preferred to just figure things out as I went along. The biggest mistake that I made was (mine is an old observatory that I renovated) was not using some kind of raised floor so that I could run cables. In your case, when you pour the foundation, make sure that you know where you want everything to be in the final configuration and run conduits accordingly. Oh, and you can't have enough storage for spare parts and basic tools.