Rent with option to buy

[Patricia Gemming]

We have a co- op which we inherited when my father-in-law passed away. We have someone who wants to rent with an option to buy after one year. We were only asking for a security deposit and $1800./mo rent. Do we have to put any of the rent towards the buy? Does the person have to give us any money separately towards the buy when they sign a contract? thanks for your help.