I would suggest saving enough for your down payment and some closing costs, then buying through the normal process. Lease options are very confusing and very uncommon in this area. If you are renting, you are throwing your money away. You will be surprised how much you will save by buying a home!
Foreclosures are never available for this as the banks want to get the properties off their hands--they do not want to be in the landlord business. however,a local agent could find you such properties on the MLS. Contact a realtor.