How much money

Im afraid that question is the same as 'how long is a piece of sting' - every person playing this will spend (or not spend at all) different amounts - there is no average figure but if you are thinking about spending my advice would be to give yourself a budget before going for pulls etc and walk away if you don't get what you are looking for - a lot players have regretted doing the chase for mega's and not getting them

Enough that I should have a better roster. Lol.