There is no wishing well cheat that works. However there is a guide for money tree, and a money grabber for money tree available for download here.
I wouldn't even fool with the Wishing Well because the chances of having your wish granted is very slim. However, if you get enough points on here, you can buy a NP Grabber for the Money Tree.
Also, I would recommend the Igloo ABer. Just have at least 5k np on hand and AB away. Just be careful, since it has a high freeze rate (I've experienced this - one account iced).
Its not as high as a Main Shop buyer but still high non the less I say no more than 3 hours a day. Even then you make atleast 75k depending on how good the RS's were.
Ok, because I'm using the Igloo and I only keep it on for about an hour or 2 every 5 hours to keep down the suspicions.
Thats about how much I run mine unless I'm in a don't care if I get iced mood then I just leave it overnight. The profits are crazy but it isn't worth it lol.