Financing with temporary employment

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I am listed as a temporary employee for a company. I work 4 to 5 months a year and net around +/- 100k a year. I am planning on looking for foreclosed homes and trying the lease/option plan. Is there any way that I can get financing or do I have to pay cash for these houses. I am thinking that if I can finance two homes a year with half down, my cash flow will be higher than paying cash for one house. Any suggestions? Am I on the right track? Thanks in advance.
Dustin