Will writing a book fund my pilot training?

It sounds like you really have the determination to go for what you want. On the financial side, have you talked to the flying school with which you're doing your training about your concerns? Many have strong relationships with commercial airlines that offer part-sponsorship for training. Take a look at the employment and sponsorship section of Cabair College of Air Training , for examples of how this can work. If the place you're training through doesn't offer anything like this, you could try contacting airlines you'd like to work for directly. They may be interested in forming a relationship with you so they can secure your services when you qualify. There is currently quite a shortage of pilots so they may be more interested than you imagine. One organisation worth contacting is the British Women Pilots' Association, they also have some information on scholarships on their website.