There already exists a person I believe in Japan or Korea(not sure), who decided to make a career out of it. People hired him for all sorts of work like say, be their +1 in a wedding, date, shopping, going out and spending time etc.
Your idea does look similar, but it isn't nearly as fun to be with a person unless you trust them and trust that they are non judgemental and want to genuinely spend time with you. Atleast, that's my opinion. So, I personally still feel, it's better to find a person with whom you are comfortable and the person wants to spend time with you. It would really enrich your life.
Although, if that seems far-fetched, this idea still looks fun, Just when you buy someone's time, do make sure you do your due diligence