I don't know if that's good value or not, but I think I can help with your lens board question. There is normally a hole cut in the board to accommodate a particular diameter of shutter. Shutters have a number which describes the size, commonly number 0, or number 1 for 4x5 cameras. You need to ascertain the diameter of the hole to work out which shutter and lens combination will fit. You mount the lens and shutter onto the board with a lock ring. Some lenses don't have shutters built in, but to begin with I would think a lens /shutter combination would be best. Have a look at ads for lenses and you will see what I mean. The two lenses I own have Copal No 1 and Synchro Compur No 1 shutters. You can buy extra boards for other lenses as you acquire more, or for different sizes. I cannot recall the exact measurements of the shutter diameters, but the holes are usually referred to in the No 0, No 1 sizes, etc, so you need to work out what size drilling you have. I hope this helps.
Alex