taking on two projects is fine, IF YOU HIRE PEOPLE.
it is blatantly obvious that one person is barely capable of keeping up with the investors demands fort regular content releases, and is a fulltime job for a single person.
regardless of how big of a render farm you have rendering for you, writing code cannot be sped up. if you think you have time for two games, then your games are going to be buggy and shit quality, or your investors are going to be ripped off by the expectation for regular, sizable updates released AT LEAST every 6 months, with 3 months being more acceptable (ie: not generating complaints). if you cant meet that investor requirement, sell your idea to someone who can.