I find that if a landlord has a tenant in their property and decides at some point to place the market for sale, their first logical choice would be the current tenant. They are already occupying the property and it just makes sense to ask them first. So in that respect you have the first right to refuse to purchase. On the other hand, if you are looking to make a portion of your rent go towards a down payment: That type of rent to own doesn't happen too often right now. Also, why not just monitor your own funds at this point? Why count on the owner of the property to handle that? Also, often a purchase price is determined up front, and I don't know if everyone in the transaction would be comfortable with a price that is negotiated a year or years in advance. Hope that this helps somewhat.