Hi, See this theme http://themeforest.net/item/realtyspace-real-estate-wordpress-theme/15965811?s_rank=2 , It’s well documented and has good support. We can offer custom service, just contact authors. Thank you.
Please take a look at this theme: https://themeforest.net/item/citilights-real-estate-wordpress-theme/9249730?ref=NooTheme
It has sell, rent and buy options just like what you need
Hope this helps.
Check out Zoner - real estate wordpress theme
Perfect for agency owners, personal or standalone Real estate agents, who want to receive personal, regional or global Real estate WordPress website.
Its new message system allows directly send message to users or agents whose properties can appear in the field of your interests.