Well I am obviously not an Oblate at this time, but I will attempt a response anyway.
From what I can tell, the actual requirements for Oblates are relatively minimal. You are asked to incorporate the following things in your life. 1) Daily Mass; 2) Divine Office; 3) Monastic Spirituality; 4) Lectio Divina; 5) Personal and Contemplative Prayer; 6) Scripture Study. There are likely others, but that seems to be relatively consistent from one monastery to the next. The key though is, that you are to bring these things into your life as your state in life allows.
So, if you desire, one could really structure their life as if they were in the monastery. If you can’t do that, then you can’t, and that is OK also. I expect the number of people who are really able to do that on a regular basis is very small.
I really feel that is more about the spiritual mindset. Hopefully the Rule and Monastic Spirituality, rooted in the Tradition of the Church and the Fathers, comes to color every part of your life and become the lens by which you see the world and approach God. Even if you did all of the Hours, Daily Mass, Lectio Divina, etc. on a daily basis, you are still only talking about a few hours work of actual stuff. The key, from what I can tell is that you are doing one of those things at various times throughout the day and thus, consecrating the entire day to God.
Cheers!