I don't think reviewing a property will invite legal troubles but reviewing the landlord may do so. You need to check it with lawyer. There must be legal protection for this or you can simply transfer the legal liability to reviewer through your TOS. For example, people get sued for tweeting bad things about other people but twitter doesn't get into trouble.
As far as being feasible is concerned it depends on your resources and what you want from it. Do you want to earn money through it? Do you have the skills to develop and market it properly? Is there a paying market? These questions depends on research and lots of ifs and buts. So, it depends.
As far as being feasible is concerned it depends on your resources and what you want from it. Do you want to earn money through it? Do you have the skills to develop and market it properly? Is there a paying market? These questions depends on research and lots of ifs and buts. So, it depends.