launch only in one platform, if you able or if you planning to launch your Pre ICO and ICO in different platform you will confuse your participant also you will be having issues on the token. by the way y=if have knowledge analytically and have some team to work on but dont have enough funds. i think it is better to take an advise to any expert or try to talk to different investor show your vision and mission and  how the project will get to start and their benefits after the project before launch ICO. because as we all know most of ICO right now are not in good image. dont let your project be one of some ICO that go down , if your team are truly and serious about your project.

Best Regard to your Team,Dev and to the Project!