I don’t have final numbers to this project as of yet. Just trying to speculate about what I should be trying to get setup. I would like to be off the grid as possible so originally I thought I would need three for the future addition of an EV as well.
the house is south east facing
There is no such thing as "off Grid as possible." You either are, or are not, connected to the Grid. If you are connected, the local PoCo dictates the terms of how you can use your system. You need to know what those rules are.
So Tesla proposes most of your solar tiles (the 2.7 kW array) facing northeast, the next-to-worst direction for solar in North America (only due north is worse). Do you often have morning overcast or fog? Both of those make easterly facing less efficient.
Why isn't the southwest-facing (1.6kW) array expanded? That is the best direction you have. Is the back half shaded by trees?
Why is there nothing on the other southeast-facing roof? Is that roof shaded?
Equipment location section says, "At time of installation the Tesla crew will discuss with you the exact location based on your preference and install feasibility" That is insane. You don't want to be making such decisions while a crew is standing around waiting to start. Exact locations of PV tiles should be settled before you sign the deal.
Check out your proposed systems using PV Watts. This free calculator is capable of adjusting solar inputs for latitude, longitude, compass direction and roof slope.
PVWatts Calculator
Enter the relevant information for your address, azimuth (compass direction expressed in degrees), roof slope, etc. for each of the proposed roof sections. If Tesla refuses to tell you the rated output watts of each tile, you can calculate it by dividing the proposed areas by the number of tiles.