Hi PK,
I've just took the numbers you've provided (thanks for this) and based on the values (not including any Storage details) the calculator comes up with an estimate of 8 i3 Nodes, or even 3 i3en Nodes:

With those numbers, you could then check the pricings for the Region you'd like to deploy in.
In the above example, 8 Nodes i3 in U.S. East would be like:
- on demand, 12 month term: Estimate Cost: $586,433.86
- subscription, 1 year: Estimate Cost: $415,896.00 (when paid upfront)
Please keep in mind that these are only assumptions, as in no way I'd be able to know if this would really suit your needs.
Like I have no knowledge of availability needs (do you need a stretched cluster, maybe?), nor the actual amount of Storage needed, etc. It is only meant to be a rough guideline on how to get a better understanding how sizing/pricing may look like.
But I totally agree that it would be nice to have one go-to sizing/pricing tool, where a customer can view all relevant estimates in one view.
I will feed this back to the team who are supporting the sizing tools available.
In addition, I would recommend to reach out to your Sales Account Team, as they can also help you to get validated numbers and can help you in analysing your current environment, to match with the best Node Type(s) for your needs.
Hope this clarifies it a bit better. If not, happy to discuss this further.
All the best and stay safe,
Rick