Terms are much more important than price. A Lease Option is much more complex than a purchase. AND you have to anticipate future depreciation or appreciation. Be sure to get pre-approved for the loan you need to exercise your option, according to today's Lease Option underwriting requirements. Who knows what lenders will want tomorrow, but I doubt it'll get any easier than it is now.
Interest rates change without notice.
When interest rates go up you may not qualify for the loan anymore. Lease Option contracts don't usually contain loan contingencies. If you can't exercise your Option, you usually lose your option money and the rent credits. Be realistic about Fair Market Value, and yes, sometimes prices go down. If the property doesn't appraise before your Option expires, you won't be able to purchase unless you're willing and able to bring in the cash for the difference between appraised value and option price.