Will I get more depth of field at f32, if so are there any disadvantages to using such a small aperture other than a longer exposure time.
Also if using a 50mm lens gives a more natural perspective is there any reason why I shouldn't just shoot two images and photostitch them together instead of buying a wider angle lens.
Howdy, forgive me being in 'teacher mode'
As others have pointed out a smaller aperture can have several effects. Smaller apertures (bigger f number) do give more depth of field. At the same time, the light travelling through any aperture spreads (diffraction), this is more obvious with small apertures, and appears as reduced sharpness. The 'benefit' of increased depth of field can be masked by diffraction; usually around f11 to f22, depending on the lens and the camera.
Stitching gives 'the same' effect (and perspective) of a wider angle lens, sort of. A search of this forum on 'stitched panorama' will turn up a load of useful information. Because the photographs that make up a stitched image are taken at different times a moving subject can cause problems. Rotating the camera/lens/sensor to point it at different parts of the subject means that images do not join perfectly (their geometry is different) careful technique and/or special equipment can minimise the defects.