Ebay cheapos to practice honing are a must. When you hone a couple - you *may* be ready to handle the TI.
BTW, the Dovo will also need to be maintained, and touching up / refreshing is easier than outright honing...
Don't worry about saving the price of the Dovo and just getting the TI honed - a couple of razors is not too much (I'd venture most people here have more than that

)
Cheers
Ivo