Trouble Calculating Measures Using Multiple Tables

I am trying to create a measure that will calculate the target number of accounts and leads to show in several card visualizations in order to maintain our marketing/sales pipeline, but I'm running into problems building the measure due to the relationships, so I'm wondering if I can get any insight/suggestions here.

Here's a little background on what I'm trying to do before factoring the relationships into the equation. 

1. Our benchmark here is that there needs to be 6 accounts per business unit qualified each month. This is the single static number in the measure since even our number of business units change throughout a given year.
   
   
2. For the particular "bucket" in question (Account Score 1-40), we want to have a pipeline of leads moving through on a consistent basis and the amount in the bucket is determined by multiplying 6 by the number of months it takes an account to reach a total score of 40 points (at which point, it's an MQL). This is in the CRM-Leads table as a calculated column per lead 
   Time to 40 =
   DATEDIFF (
       'CRM-Leads'[createdon].[Date],
       'CRM-Leads'[fsr_leadscore50date].[Date],
       MONTH
   )
   and expressed in the visualization as an average. (Yes, I'm aware we're measuring account score movement on the leads table, but account score is a calculated column without a timestamp, so I can't do a DATEDIFF calculation there).
   So the simple calculation would be
   Account 1-40 Target =
   6 * ( AVERAGE ( 'CRM-Leads'[Time to 40] ) )
   
   
3. The measure MUST be dynamic and change depending on the level of assignment clicked (all, regional, business unit), therefore I need to calculate the measure per business unit so it can be sliced the different ways.
   Total Account 1-40 Target =
   COUNT ( 'CRM-Business Units'[name] )
   * ( 6 * ( AVERAGE ( 'CRM-Leads'[Time to 40] ) ) )
   
   
4. To further complicate things, I then need to dynamically calculate the target number of leads in the leads 1-40 bucket, which is done by multiplying the above calculation by the average number of board members, which is a measure in my CRM-Accounts table
   Average # of Board Membersper Account =
   DIVIDE (
   DISTINCTCOUNT ( 'CRM-Leads'[leadid] ),
   ( DISTINCTCOUNT ( 'CRM-Accounts'[accountid] ) )
   )
    I believe that calculation would be:
   Total 1-40 Leads Target =
   'CRM-Account'[Average # of Board Membersper Account]
   * (
   COUNT ( 'CRM-Business Units'[name] )
   * ( 6 * ( AVERAGE ( 'CRM-Leads'[Time to 40] ) ) )
   )
   
   

HOWEVER, as you can see from the screenshots, the way that the relationships currently work, I can't figure out a way to pull these formulas together in a way that works. Do I need to create a separate table for this? Should I set up my relationships differently (all are set up as many:1 with many in the left column, with the exception of business units to assignments, which is 1:1)?

I'm still relatively new to Power BI, so I'm at a bit of a loss. Any suggestions would be EXTREMELY helpful. Please let me know if you need screenshots or further explanation of something. With the exception of sharing PII, I'm happy to provide details.