A tenant doesn't have the right to make wiring changes of that magnitude. You need to get the landlord to go down to the planning dept and make an application for an electrical permit to change the existing meter and service. If you have 200 amps in an all electric home you don't have enough amperage to run a sub panel. It will require either a 400 amp meter pan and another 200 amp box with a disconnect between the meter and service panel, or another meter pan and breaker service panel, say 125 amps, both mounted on the garage wall. Then you can run the wires from the lugs of the meter to the two busses in the service panel. You'll probably have to run 1/0 hot wires and #2 ga neutral. Those wires will run from the meter through the conduit and hang about three feet out of the weather head, and that is what the electric company will splice to AFTER the planning dept approves it, and places tape around the conduit with their initials on it. The conduit will probably be ten feet in the air above the meter, wires inside, and may have to go through the edge of the garage roof. My planning dept required a water proof box with a GFCI outlet within 5' of the meter to test. Only then can you start putting breakers in and running wire to lights and outlets. BTW, you want a single pole 30 amp breaker for your TT. One hot will go to the breaker and the other to the neutral bus, and of course a ground. Every state and county have different codes and requirements. I've installed over 20 and rarely found two exactly alike. You can go online for your state and county and find the planning dept. Then look up electrical installations. You want "change or addition to an existing service". They will have diagrams you can print out and an equipment list so you can cost it all out. Personally if I were you, I'd want the 125 amp new service. Then you'd have room for A/C and extra circuits. Good luck to you!
Moved from a 2,000 SF home into a 2014 Puma, about 260 SF. On two acres. We brought in power, water, and installed septic system. We've been here a year now, my wife, myself, and an 80lb female Weim named Daisy. We can barely see our nearest neighbor, one of two.