There's also the Burke and James Commercial View. Very solid and full movements--and usually <$500 for an 8x10. A 2D is a bit over 10 pounds without the extension rail--it may be bulky folded, but it's not heavy. Even with the rail, it probably weighs less than a Deardorff.
a 5x7 rittreck view might be an option. would be within your limits, folds nicely, comes often with a 4x5 back as well and there is an 8x10 extension (limited moves then of course) which is a bit hard to find but on sale from time to time.
just get an 8x10 camera and find a 5x7 back for it
you don't need more than one camera ..
the camera is usually the least expensive part of LF photography.
In any case, I would caution any beginner to avoid this camera. Yes, they are pretty cheap, but unless you like carrying a ton of metal around, this is NOT the camera for you. Maybe the OP is young and spry and loves a good workout, but lugging that beast around on even a modest summer day? No thanks. Go with a more modest and beat-up Kodak or Ansco.
Seneca Improved is another brand of sturdy inexpensive wooden field cameras. Do not think wood=fragile.
Old view cameras aren't, for the most part, directly comparable to old 35mm or medium format cameras. View cameras are much simpler in construction, for one thing, and the parts are carpentry-precise, not machinist-precise. Just about the only part that decays over time is the bellows; you ideally want one without holes in it. New bellows can be bought and installed by anyone with rudimentary household skills. Think of it as buying old furniture instead of an old mechanical camera.
Lenses are another story; glass can be chipped or scratched, mechanical shutters can be broken. Even a working shutter can be wildly inaccurate in time. Fortunately there are a lot of experienced repair folks who can fix that stuff for you at reasonable prices.
Take the time to get informed about cameras and equipment and be a smart buyer; you'll find that large format is not as expensive or as intimidating as some may fear.
In another thread the OP said that he was interested in doing portraits with an 8x10 camera. The C1 is great for that but as you said is very heavy out in the field. I imagine Karsh used an assistant to carry it when he used it on location.