cost.. unless you are doing it all yourself from scratch can get prohibitive. With the price of N's going down, and 2500$ being for mint shape, expect to easily sink in 500$ for live hyds depending on how you accomplish it. many who go live hyds, also want power steering or loaders, and if loaders, both.. you can turn a 2000$ N into a 5000$ N by adding live hyds, power steering and a loader. It's one of those 'how fast is your wallet' questions. Anything is possible with cubic money, unlimited labor, and a torch and welder.