I had a Calumet black 8x10 camera, and it was heavy. (Heavy cameras need heavy tripods.) It has all the needed movements, and then some. The Green Monster Calumet might work. It was made of magnesium alloy and weighs about 15 lbs or so. (If I were to purchase one, I would ask about weight up front.)
Many wood cameras to which Vaughn refers have enough movements for landscape. My preference would be for an 8x10 with front tilt. An 8x10 Ansco would be a good find, if it's in reasonable condition and light tight. Unlike 4x5, you don't need bag bellows for moderate wide-angle photography. 8x10 wide-angle lenses that require a bag bellows are very expensive.
The 300mm f5.6 lenses aren't that large, so go for that one for the portrait depth of field. I've been looking for a 300mm and have my eyes peeled for a Fujinon 300mm f5.6 with inside-lettering. Theses are older, single coated optics, that have an excellent image circle. Kodak Ektars are Tessar lenses and don't have the image circle of a Plasmat, like the Fujinon above.
But, look for the smaller lenses (f9, f10, etc.) above a 300mm focal length. For example, even the 360mm (f6.8?) Symmar-S is a huge and heavy lens. Although more expensive, the 355mm G-Claron is a very nice option. (It's single coated.) Absolutely huge image circle stopped down.
You might consider beginning with an 8x10 camera and a 300mm f5.6 that are reasonably priced, and then wait for reasonably priced lenses in other focal lengths. For example, my 450mm Q Nikon (single coated version of Nikon's 450mm M) lens was about $325. Believe it or not, I purchased a Repro-Claron coated 610mm lens for about the same price. I had multi-coated optics, decided to stick with all single-coated, and saved a ton of money. And, I like the look of single-coated optics on 8x10. My primary sources of lenses are EBay and the Large Format site.
A lens that would be excellent for moderate wide angle landscape work is a 250mm Fujinon f6.7. It's single-coated, has a large image circle (for a Plasmat) of 389mm, and it's usually reasonably priced. The f6.7 is an example of inside lettering.
I also have some older Arca equipment, and along comes an older style 8x10 conversion kit that I purchased for under $400. Combining the two, I ended up with a fully functional, very nice 8x10. So, workable, good deals do come along.