No offense, but like @01ssreda4 said, if you do not understand @shakedown067 post then you really need to research more. If you are just wanting to bag low enough to rest the tire in the top of the wheel wells then it is fairly easy but wanting to lay frame is going to take notching, cutting out of the area above the axle (seat area), cutting out of the front wheel wells and relocating a lot of parts, etc. A lot will also depend on wheel and tire sizes (your current ones will likely not work). This is really something you need to have well planned out. Bag prices are the last thing you should be worried about.
Not trying to be a dick but if you do not research and research more you will end up with a partially finished project or something unsafe on the road.
Not trying to be a dick but if you do not research and research more you will end up with a partially finished project or something unsafe on the road.