If you are self employed ( and it sounds as if you are if you are running a kiosk in the mall ) you WILL need 2 years of tax returns to show a lender.
What you have to remember though, when you are self employed, is that the lender does NOT take your gross income from your business. It will take what you NET. So if you make 60k a year, but show on your taxes you only take home 20k (because of deductions) you will be approved for what a salary of 20k a year will buy you, not 60k. That is why you have to plan ahead if you are self employed and want to get a mortgage. You have to take 2 years to not take so many deductions (but pay more taxes) so that your income will be higher and you will be able to qualify for more.
Are you saying you have a 50k down payment or a 70k one? If your net income was 60k a year, you could afford up to 180k mortgage. So, if you were buying a condo for 250k and put 70k down, you may be able to do it.
Go talk to a lender and see what they would require of you. I am sure though, that they will tell you to come back after you have 2 years of verifiable income from your kiosk business.