I can hardly remember my early days now, but I think my first VCV must've been a lite bank. I never really got around to otoing it. The second one, however, was a proper 5 mora full VCV, which probably took me a few days to record and the slow work of otoing over the course of a few weeks.
However, you shouldn't be relying on stories of first attempts to get an estimation of how long it will take you. Theoretically, you can record a standard Japanese VCV bank in 30 minutes, and generate a rough base OTO in just a couple minutes.