Upvote:1
They want to see banks statements to see a stable pattern of income and expenditure. Having a bank account isn't saying much, having money on it isn't saying much either. Are you keeping your business and personal accounts separate?
For a tourist or business visitor visa, you should carefully check if your missionary work is allowed. You do not have to get cash payments to make this work. Ask on Expatriates.SE for work visas.
A sponsor is not the same as a character witness. Is your uncle involved in paying for your trip, or arranging it? Then it needs to be mentioned. Otherwise you should only mention him if his presence is the reason why you go to Sweden, but you are traveling for work, right?