You could start the trial today, as the RCs won't have any new features and there are no reports of bugs in the Vantage export. You shouldn't have to texture and light in Vantage, that should come across from Corona (other than things like Distance map etc., not all materials come across). Animation you will have to build in Vantage as you can't export animations, and the ability to render animations from Max / C4D will come in 13 if all goes to plan, using the Live Link - we'll have quite a detailed tutorial on how to build animations within Vantage within the next week or two, so maybe you want to leave activating the trial for that, so you have all that info at hand?
Vantage can certainly help with stills.