It can work, it just takes longer and is harder to maintain the momentum when you are only working on it in small chunks.
If you could drop to part time work to cover the expenses then that might be a more viable approach but unless your startup is launched and generating revenue (even 1 sale a week) within 3 months you will notice that it gets harder to keep going, pivot and really get decent traction.
If you could drop to part time work to cover the expenses then that might be a more viable approach but unless your startup is launched and generating revenue (even 1 sale a week) within 3 months you will notice that it gets harder to keep going, pivot and really get decent traction.