step 1 :
teleport to "kaya wan shrine" then go to "WETLAND STABLE"
( the position on the map is around central hyrule )
step 2: ( see in my video at minute 02 :39 )
run botw_editor.exe then set item_enemy31 (giant ancient core) to 999
get the editor here : https://www.4shared.com/rar/HI40nx9Ue...
step 3 :
sell it (giant ancient core), you will get 200 rupees for 1 giant ancient core, so if you sell all 999 x 200 = 199.800 rupees
** Repeat step 2 and 3 for unlimited rupees and items **
Note :
for detail howto do that see my video...
"cheating is suck but it makes life more easier"
enjoy...