Rhino is right about the guides purpose, here is how that is achieved. When we build a rod, we start with one guide for each foot of rod length +1 not including tip. We attach the guides temporarily and static test to see how the line travels through the guide when the rod is under load. What you want to see is the line off the blank and flowing through the guides in an arch matching the rod blank. If we can accomplish this with fewer guides, we remove them and save the weight. Regardless of budget, I'd suggest bringing a spooled reel you plan to mount when rod shopping if possible.
Mike