12000 eh? what, apples? oranges? this is an english forum so please so a form of currency we understand.
if you can't even afford i3, then you should look into AMD Athlon II x2 250 for $62http://www.newegg.com/Product/Product.aspx?Item=N82E16819103681&cm_re=amd_athlon_250-_-19-103-681-_-Product
btw... just curious... how do you edit video with 1gb ram? I also edit video and I have 8gb myself and I often run out of memory during certain scenes, hard to imagine.