You can 301 redirect whenever you want. Divert to a property with legit on-site SEO, numerous pages of content, and perhaps even some links arbitrary of RH (like some sexy site-wides and high PR blog posts) and you have yourself the recipe for a SERP buster. I'm still amidst playing with this service, however, I have placed multiple orders and gauged the results to some extent using one page properties on fresh as well as aged domains. Everything looks good. A lot of these links are unique in the sense that you haven't seen them before, at least not for sale on forums such as this one.
As most of you are likely to opt for passing this shady juice through a 301, I might as well offer a bit of clarity on the matter. Let me tell you about the first website I had de-indexed ("sandboxed") by big G for shady links. Property skyrocketed in the SERPs and held it down for roughly one week before it was banned. I 301d that shit to a new property and watched the juice pass to the new property WITHOUT THE PENALTY. Years later, this website is still indexed, pulling organic search traffic, and holding down a mid level PR.
When should you 301? Whenever the fuck you want, unless you're scared. If you're worried your 1 page site is going to hit the sandbox, you can always wait it out and then 301 it after it's hit, however, if it never takes a hit, you're wasting time and we all know time is money. If you're a real bad ass, you'll throw this shit straight at your money sites without that pussy 301 redirect shit.
This is rank and bank so whatever the fuck happens, you deal with it. Re-build, re-build, re-build.
Is this my first post?