Contrary to what others may think on this subject, printing a single book on your personal home printer will be beneficial than sorting the services of professional printers. Every problem solving depends mostly on the situation.
Am assuming you're referring to a single book, maybe a story line book and probably a prototype, but definitely not a text book, my conclusion lies with the earlier.
It won't require an out of the box expense and resource to achieve this goal. One pack of A4 paper and a single cartridge of ink is way morethan enough to do the job. I've done the same morethan a few times. If you're an experienced writer who sends out manuscripts of work done for certain possible considerations every now and then, you'd agree with me. This is because printing a single book, even if it's just a prototype tends to deep much further into your wallet. In case you didn't know, it's a bit difficult to find printing services that will accept an order with just a few work of prints, talk less of a single book. And even if you're lucky to find one, proffessional printers go by a universal strategy, the more copies, the lesser the cost.