I use jiffy 7's and tap water straight out the tap to root clones some times bottled water or RO, when their rooted I pot up into 1ltr size pots of soil and feed with rhizotonic if you fancey for a few weeks at ph 6.0/6.3 its not important then water all the way if you need to use plant food on a weed you can but it doesn't need it at all,,,, doesn't get any cheaper/easier guys and gals!!
A box of 1000 jiffy's is around £60/75 or £5/7 a bag of 50,, and good soil is £10/15 a bag or £270/350 a pallet,,, Grow it out FAT!!!