A crown graphic 4x5 (graflock)would leave you the option of downsizing to 2x3 or other sizes, I should have gone this course in retrospect, getting from 2x3 up to 4x5 is limited, the only advantage to 2x3 is you could use 6x4.5, to conserve film, as that option is limited for 4x5.but with 4x5 you could have a few 4x5 film holders and roll backs with color or black and white
The crown is limited in movements but it let's you use wide lenses without the headaches of other systems, for example a horseman 2x3 kind of sucks for a 65mm lens.
As for lenses don't forget about a pinhole, very economical.
You may find a lens with an old shutter that seems to work well at room temp but outside in the cold, you might have an unpleasant surprise.
The best thing about a field type(or press) is portability, if the lens fits inside you are ready to go...