if you do go the cat5 route, i would recommend going with stranded core wire. be aware cat5/6 cable comes in 2 varieties, solid core and stranded core.
stranded core is usually used when making patch cables because they always get flexed and plugged and unplugged and whatnot... stranded core wire flexes better without breaking.
solid core is used in plenums, roofs, and walls. basically where it's going to get laid and then never be touched again. if you end up using solid core when making patch cables, after a while they stop working because the copper wire breaks.