First off, a lease option is not a "buy" - it's money paid now to buy in the future. You may be able to buy (actually purchase) with Seller financing, but it will depend upon the way the contract is written.
So here's the question? Knowing you don't claim enough taxable income to qualify for a mortgage, are you willing to do so for the next two years (or more) as required by a lender??? This is the Achilles heel for independent contractors everywhere who have "legitimate" tax deductible expenses which then obliterates income.
Decide now - otherwise you may be where you are today - two years from now.
To find homes you need an agent in the area. To find one, use the "Find an Agent" tab at the top of the page and search by city and/or zip code. Write down the names and phone numbers of at least three and call them. Yes call. Calling is the best way to receive an immediate response.
Good luck to you! As agents we all know how tough it can be to "qualify" when self employed.