youll have to proove by showing bank statements that show that much going in each month, etc.. it varies and you will have to proove to the extent the agent wishes you to proove! I have had friends tell me from each sprectrem either how easy or difficult it was.. depending on who they got at the imigration office...

it will be very hard to tutor for yourself, because you need a sponsor, so to speak, here in mexico ( a mexican employer) that can proove that the skills you bring is not founf in mexico withinin the mexican workpool.