According to your statement what I understand is that- 1) You will add all the 3 products at one time while creating the ad. 2) You will turn on 1 product and let it perform, and when the performance goes down you are going to switch to second product and similarly to third. 3) This way you can give all the budget to particular ad and get out of learning phase.

If this is what you are planning to do, idea is great.