How Much Down And Is Rent Credit Non-taxable??
What kind of % down are the rest of you able to get to sell on L/O and not sit on it for a long time? I am talking about a house that will probably refinance FHA. Also, if the pack is $200, and I give $200 rent credit, can that be considered option consideration and not taxable till the option is exercised?
Gary-TX 
When doing a lease-option, your T/B's option consideration payment (downpayment) will depend on your area's market, but usually can expect from 1-3% of the purchase price as downpayment and move it fairly quickly.
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As far as the rent credit goes, it would depend on how your deal is structured as to whether or not it is considered option credit or not. Instead of giving rent credit, a fellow investor here makes it part of the option agreement (ex - $3000 downpayment needed, collect $1800 upfront and 'finance' $1200 <12x$100>
Your right about the option not being taxable until the option is exercised or ended, but talk with your tax advisor about this as sometimes it is beneficial to pay it in the year received whether it has been exercised/ended or not.
Roger