Google Large Format Photography Forum and then click onto the Home Page. There is a wealth of free information there.
Large format 4x5 cameras and lenses can be less expensive than medium format equipment. It all depends upon what you want. I have seen monorails sell for less than $100.00. Just add a $150.00 lens, cable release, a black sweat shirt for dark cloth, a cheap 4x loupe and a few film holders (5 would be great so you can load a whole box of film) and you are ready to go. You can even use your dslr meter if you don't have a hand held meter.