Lease with option to buy/Lease purchase/rent to buy are all same financing options.
The renter has a period in which to purchase the house by building equity and obtaining traditional finance unless you are going to own finance. If owner financing then the main point is that you will be acting as the Bank/Leading Institution. This can be a valid option depending on your finances. The loan should be secured on the property. The terms of the agreement can be what ever you want or whatever is mutually acceptable. The purchase option is usually 1-3 years but can be any number you agree.
Benefits to you;
1) Recieves full asking/agreed price (at time of rent to buy contract)
2) Relieved of all maintenance responsilities
3) Rent should cover outgoings on property (mortgage, taxes etc.)
4) You recieve the non refundable option to buy payment (3-5% of asking price).
5)The rent usually looks after property better as intending to purchase.
6) Possibly no Realtor fees if you do it all yourself.
Benefits to buyer;
1) Option to purchase property in "x" years time, gives them time to sort credit issues out and possibly aquire equity in the house for traditional refinancing.
2) Pride of ownership.
3) No closing costs
Things to watchout for:
Sub leases.
Second home tax issues.
Risks:
Damage to property
Eviction costs
Insurance issues.
Try and find a Realtor(if you need one) and Attorney who have dealt with this before, it should be relatively easy to find.
See article:
http://www.charleston.net/news/2007/nov/12/contracts21769/Possibly re-word the questions you have and post in the Agents section of this forum. They might be able to point you in the general directions of a sample contract that you can look at and alter.
Also do some internet research, you need to feel happy with what you are doing. When you understand it you will be confident and happy to proceed.
Hope this helps slightly, but the above is only my opinion and not meant to be used as advise.
Regards
Alan