If you do this often, you might benefit from using a flip mirror or optical manifold (like the Taurus Tracker). Such a gadget holds Both an eyepiece And a camera in place at the same time.
With the flip mirror, a simple flip of a lever on the side of the box moves the light path from camera to eyepiece or vice-versa.
With the Taurus Tracker, the light path is normally fully open to the camera; to use the eyepiece, you loosen a set screw and then slide the eyepiece focuser barrel into the light path, where a small prism picks up the light and directs it to the eyepiece. The focuser is normally a fine helical thead, so you twist the eyepiece to focus it. To set one of these up the first time, you focus using the camera in live view as you've described already, then you slide the eyepiece focuser barrel into place, focus by twisting the helical threaded tube, then lock it into place with the setscrew. Thereafter, you simply slide the eyepiece into place, or out of the light path, depending on what you're doing at the time.
Here's a photo showing the Taurus Tracker on my C-11, which I use for spectrography:
The spectrograph and camera are at far left. The tracker is the gray gadget between the scope and the black box of the spectrograph. This model has two sliders: one for a centering and focusing eyepiece, and the other for a guiding eyepiece or camera. In the photo above, only the centering and focusing eyepiece is inserted.
Each of those two gray "barrels" is helically threaded, so you can make them parfocal, and each is held in place by a locking thumb screw. There are two positions for each: "in" the light path and "out" of the light path. They will lock in either position.
This is a Tracker III (three positions: camera, or straight through, and two eyepiece, or prism-fed). The Taurus Tracker II is similar but has only two positions (only one eyepiece position).
The universe is not only stranger than we imagine, it's stranger than we CAN imagine. --- JBS Haldane
Come visit me at Comanche Springs Astronomy Campus (we're on Google Maps) in Texas.