You need a bigger pole,.. I'd go for 18' minimum.
The reel is rubbish,.. get a decent all metal one, and 100 mtrs of mini/microbore, NOT 30mtrs of 1/2" hose,... its worth the few quid extra it'll cost.
I got a 300GPD RO off ebay for £115 inc postage a while back. The membranes are still going strong,... but even if they only last a year its a bargain!
Get a bag of resin,.. better to be looking at it than looking for it!
Are you getting any kind of tank securing brackets?