Well, if you had to spend money to make a game on multiple platforms, they all have their benefits:
1 - PC, development tools are readily available, you can start working without asking anyone permission, distribute and fund any way you want, even is Valve and MS don't want you on their store.
2 - XB1, still relatively new, not very powerful, and the install base is relatively small (smaller than the Wii U even) but it uses the exact same libraries as the PC that you already work on and the user base is enthousiastic about 3rd party content, at least as much as it is about 1st party content.
3 - PS4, has a bigger installed base than the XB1, not a single game of the game genre as the one you are looking or (simulation racer) users very enthusiastic about your game and it's architecture is relatively powerful (more than any other console) the libraries are different, but relatively close to what the PC version of your game has.
4 - Wii U: Weaker hardware, less memory, small installed base, relatively little interest for most third party games, and completely alien set of programming libraries... it makes the port complicated on a technical point of view and likely to loose money (it could make a lot of money, but it's also likely that it won't).
So yeah, delay it, unless you have some kind of deal with Nintendo.