Artisan Archive

I am a marksman who has recently started surveying/sampeling for some monetary support. I just recently got to Surveying II and was wondering several things:

1. Sampeling is a horribly unefficent (takeing forever!). is there any faster/more effecent way to gathering resorces?

2. What skill tree do i need to master to be able to build my own harvester/extracter.

3. What metal qualities should i look for so that my metals will be nice and expensive. and what type are perticullary desired by crafters??

4. Those +surveying results that I got for surveying I and II, do they apply when i use a harvester?

any other usefulll info will be awsome! thanks~!

also, do you need a power sorce for useing these?