That is not a good life-span but what is the rest of the underside like? Is it subjected to a lot of salt and is rarely washed off (in which case I would suggest that the chassis will also be showing signs of corrosion) or is it well looked after and it is just the pipes that have gone?
For ease of use the kits are the best way to go but if you feel that you might like to do it DIY and possibly re-use the tools again then you could make them yourself.
As for SS braided hoses I thoroughly recommend them. I have been using them for 35-years (both bikes & LR's) and would not use anything else. My 90 is currently wearing some BP items that I fitted a couple of years ago, no issues whatsoever.