I hope the opinion you are talking about,is for the first part.And not about about him quitting his studies or hiring help.
I don't believe he will hire help, he's too centralized for that. I do believe he will quit his side job, Don't know about his studies though (I wouldn't quit university for adult games development).
I also think that as the game progress, average renders per update will raise, but there are some factors that may speed things up:
1. He gains experience.
2. He gains more 3D assets.
3. He has a lot of locations already done.
4. He may upgrade his PC or even buy another one.
5. He may change the storyline (actually that's already done according to L&P himself, but he never said what were the changes).
So maybe some upcoming updates will take 3-4 months and maybe not, that's up for speculation
(Sorry for the bad English)