Scanning at home with a camera and a light panel
A copy stand, a macro lens and an even light source resolve more from a 35 mm frame than most flatbeds do, and take a tenth of the time. The weak points are flatness and stray light, in that order.
Flatness
Film curls across its width. A holder that grips both edges is enough for medium format; 35 mm usually needs a mask that presses the rebate. Stopping the lens down to f/8 covers what remains.
Stray light
Mask the panel so that only the frame is lit, and switch the room lights off. Flare lowers the contrast of the densest part of the negative, which is the highlights of the picture.
Inversion
Set the white balance on the film base, expose so that the base sits just below clipping, invert, and only then adjust contrast. Doing it in another order is the common reason for flat, muddy scans.