Aces (one) in tarot represent the moment of conception, the birth of an idea, the initial inspiration. Twos represent potential, options, the balance of yin and yan where many things are possible but no action is yet taken. Threes represent the point in which plans are set in motion and take shape in three dimensional time and space. You made your decision about what you are going to do, and how you are going to do it. Now you are taking action.
When there are multiple threes in a reading, the energy of taking action is reinforced and the energies of the suits are likely intertwined. With the Three of Wands and the Three of Pentacles the passion, drive, and courageousness of the wands is coupled with the practicality, work ethic, and material aspects of the pentacles. So these two cards would be welcome in a reading where the question is about a new business venture, a construction project, or putting together a band, for example.
The Three of Pentacles also relates to working with others. This could be teamwork or working with consultants. If you are providing a service or a product, it could also relate to filling a need for clients. The Three of Wands has a vision that they are trying to realize, and since it is their vision they may very well be the driving force behind accomplishing that goal. They could be an entrepreneur, an architect, or they see themselves as a band leader. The three of Pentacles indicates that there are others involved in that vision’s successful manifestation. Whatever this project is, it is not something that the Three of Wands will accomplish on their own.
With the threes, this is the beginning of a journey to manifestation. These two cards coming up in a reading together can indicate that you are off to a good start. What they are not saying is that you have reached your destination. There are no impediments indicated here, so the project seems to be going well, but there is still much to do.

