I'm thinking of asking my parents for money.
Okay, but what do you need the money for?
I'm going to try to build a time machine.
Responsible investment is a good thing, but taking your parent's money for something physically impossible is wrong. They will be less likely to lend you money when you really need it for something important.
My parents will never believe me about this...Anyways.
Even if time travel is possible, other scientists that have way bigger funding will be the ones who can do it and it couldn't possibly be covered by just your parent's funding. If you think you can invent time travel, try to go to an academic institution and if your theories and formula are correct then they could set up the funding for your project.