Like Illy has said there is hardly a method out there that is fast and no loss of gp. However, Green d'hide with SC Needles would be one of the quickest ways, with a loss of about 40 - 50m. OR alternatively you could try doing battlestaves, great xp and about a loss of 20m.
Unless you want to do bow strings the whole way I think you should just do green hides and lose some money.
If you count losing TIME which is probably most important then I think you should just do green hide and earn some of the money back.
It was a lot faster for me over all to just do green hides and then earn the money back after words. I had 75+ RC to earn it back, so I saved time and got some RC experience although it was a bit more boring. Even if you don't have the RC level you could probably do GWD or any number of things like double nats or something.
if you don't want to loose any levels do saphire bracelets their like 40-60k exp and i hour i believe after u made em enchant them and sell on ge or just alch them.
That wouldnt be nice now would it?
Make unstrung symbols.
Inv should look like this
M-0-0-0
0-0-0-0
0-0-0-0
0-0-0-0
0-0-0-0
0-0-0-0
0-0-0-0
0 = silver ore
M = holy mould
Smelt silver ore into bars. 1k smelted = 13.7K exp
Then make the bars into symbols during the same trip.
1k symbols = 50k exp
when I did it ore and symbols wereboth 300 gp each
gl and pm me if this worked 4 u