swisha the Ph kit is like $7 its made by general hydroponics, comes with a little vial and small bottle of test solution, like GG said I have it work good,
for cheap nutes I don't know what kinda stores you avail but the alaska brand is cheap its what i started with veg&bloom like $12 bottle ea. gallon i have seen like quart size for $7 at a ace hardware thats enough if you can find it. if you can spend a little bit more like $45 bucks I highly recomend using the fox farm grow big$15/tiger bloom$15/big bloom$15 as its not too much more.the FF comes in quart size bottles sometimes you can find them in a 3pack for a little less. do you have a hydro store near you?
oh yea amost for got they look hungry might start nutes soon 1/4 strenght what do they say the 5th node I ferget you can if makes easier get the FF nutes seperate you'll have too get the grow big and big bloom rite away can wait on the tiger for flower stage it says too start feeding 2 week in FF nute schedule.

let us know if you get that 150watt HPS seems kinda hard to believe its only $20 fixture ballast and bulb . lol if you don't get it you can use 3000k CFL's
I picked up a case 24ea of them 2weeks ago for $12 thats 50 cents a piece got a deal power companay subsidized them..sweet l8trs good luck