Hi,
I am the owner of my actual company, we are dealing in architectural design and software development. As the owner as I have many years of experience in coding cost control management and business management, I can understand quite well your request.
There are some things which will not help you in your business and other that will help you.
On my opinion Tableau, PowerBI or Qilk will not make huge difference to you. They are all good, and very powerful, you can find good comparison sites for choosing any of them. just search google with "Tableau vs PowerBi" and it will give you sites of people having written very good analysis and comparison for each of them. i highky recommend you do this way
But, if you wish to see deeper in your business, I can recommend you other things, that many software sellers won`t tell you.
In my life, I generally coded the softwares (since 2002) that would do the same thing as them. The first time I did it, was, when I was employee in a construction company. It was for its oil and gas project. My softwares were free for ever.
The things about these softwares are not in the software. I can tell it, because after coding the softwares I was assigned for managing them. The problem was never on the software side. But always personnel behavious was the problem.
I learned to resolve personel problem by learning/ having a course of ISO 9000.
Of course I am a motivational talker, and this helped me. people were enthusiastic to apply ISO 9000 and use the software because I gave the motivational talk.
So to be successful with the software you need human behavioral things next to it.
No matter what you choose, if you see these problems happening (personnel resistance, or refusing, or slowing or blaming the software for the mistakes etc) just remember my advice, it will be a great help to you.
Also if you do not wish to loose money, try first the opensource alternatives to these software. I have many writings about software business and technical stuff about business. I shared my experiences:
I shared with you, one of my blog about your question. Hope it helps: