1X10 build - can I have some help please?

I'm going to build a Charge Duster - and I want to do it fairly cheaply using second hand or bargain bits if I can get them. Some of this is easy like post, saddle pedals, bar, bell...
I'm stuck on the drive chain though.
I was going to buy a second hand quality 3x crankset and put a 34 or 36t in it and then I need a derailleur, lever and cassette - the latter being 11-36. These may have to be bought new and I need advice.
Does anyone have any suggestions as to the components I mentioned - I am well out of my depth in the gears and don't want to waste too much money by buying and realising I've made a mistake? The use will be XC not enduro or dh or going to the post office for that matter.
Many thanks for any advice.
I'm stuck on the drive chain though.
I was going to buy a second hand quality 3x crankset and put a 34 or 36t in it and then I need a derailleur, lever and cassette - the latter being 11-36. These may have to be bought new and I need advice.
Does anyone have any suggestions as to the components I mentioned - I am well out of my depth in the gears and don't want to waste too much money by buying and realising I've made a mistake? The use will be XC not enduro or dh or going to the post office for that matter.
Many thanks for any advice.
...take your pickelf on your holibobs.... 
jeez :roll:

jeez :roll:
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As for the rest, pick Sram or Shimano and a budget.
Probably get better buying advice in Buying Advice.
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Single ring - plenty of choice all around the same price £30-50 I have a Raceface Narrow Wide but also use a Works Components Thick Thin which I think is the better ring, the RF is noisy when it's muddy and I don't think it will last as long ether.
The rest is dependant on your budget, I use XT rear rear mech, SLX shifter, KMC chain,XT or SLX cassette and SLX crankset which keeps everything light enough, reliable and at decent enough price level.
Scott Aspect 10
Schwinn Fastback Comp
Cube Reaction GTC SL
Obviously SRAM or shimano - but it is the spec that gets me - I cant get a conclusive answer to the short medium cage for the front and rear teeth and then the Sram X9 seems to come with both shifters - certainly on CRC - and I really only want the left one.
jeez :roll:
jeez :roll:
Zee shifter (if you need one)
Deore 2 piece Cranks running works NW ring - remeber you might need narrower chainring bolts though
Zee Wide range rear mech, or for more budget option try deore Shadow +
+ some other bikes.
The Works Components is cheaper and in my opinion better the teeth have a better cut and are taller and it stays quieter when the conditions are bad, I wouldn't buy a RF again.
You can use any XT rear as far as I know.
Scott Aspect 10
Schwinn Fastback Comp
Cube Reaction GTC SL
Thanks - beginning to get it - appreciate all your help!
jeez :roll:
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Scandal
Felt Roadie
Yeah theres two versions of the Zee mech, one is wide range for All mountain/Enduro and the other is for DH. I think they are both short cages though.
Just remember if you are going for a narrow wide ring you NEED to have a rear mech with the clutch system not just any 10 speed mech.
No you don't, I'm running a normal XT on my Maxlight with no issues whatsoever.
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Zee Mech (if you choose the right one) handles 11-36 cassettes by design.
Scandal
Felt Roadie
Correct, I run a zee mech with 11-36t XT cassette no problems!
Apologies if this is the case.
I was lead to believe that the chain would bounce about too much to let it stay on the ring without a chain device.