Questions for big rsgp sellers/buyers

Hello there i am fairly new to sythe and was thinking of jumping into the gp buying and selling game , I currently have a huge personal stock which i will be looking to sell ( Will start speaking to big buyers soon ) , But im also thinking of becoming a large scale buyer and seller for the profit , These questions are mainly directed at UK Dealers but opinions and feedback from others are welcome.

Here are a couple of questions for the bigger uk buyers

For those moving amounts of stock 10 - 15b a week , What is the average profit you make per week?

For those paying and getting paid with bank transfer , How do you act towards government inflicted income taxes?

What are the most credible payment methods for this business?

Have you been questioned by authorities about your income and where you are getting your money?

Have you had any issues legally due to the terms and conditions of jagex clearly stating their full ownership of gold and accounts at all times "You agree that all intellectual property or other rights in any game character, account and items are and will remain our property." ?

Feedback will be highly appreciated from people big in the business , And for big buyers interested in maybe buying some bulk gold you are welcome to pm me , I have a huge amount of stock that i will be looking to sell.

Many Thanks
Kenpen