Soldering cables is relatively simple once u get the hang of it & an invaluable skill to learn that lasts a lifetime....make sure u have a soldering iron of atleast 40watts+ and if u can aviod it try not to use electrical solder,silver solder is better cos it's stronger.
The actual job is a time consuming/fiddly process(satisfying though) but it will save u money & get your cables taylor made.
If u havn't already search this forum on how to solder,or ask elsewhere..............PRACTICE.
PS....if u have no interest in making-up cables there are stores that do it professionally.