Frank wants to get an inkjet printer, but he doesn't know if they're really worth the money. Leo says that while the printers themselves are cheap, the ink is extremely expensive. And he can't refill the cartridges because 1) they're messy and 2) they often won't work in the printer because of proprietary circuitry. It also affects the print head. So Leo doesn't recommend it. Frank could buy re-manufactured cartridges, but at that point, he may as well just bite the bullet and buy a new one. Plus, some cartridges replace the print head in the process. Also, if doesn't print a lot, inkjet printers will clog and that affects print quality. So if he prints occasionally, then a laser printer is a better option. The cost per page is also cheaper, but they don't do color very well.
If Frank prints a lot, Leo recommends the Epson EcoTank printers. They come with 2 years of ink built-in.
(Disclaimer: Epson is a sponsor)