It has been bad for the general US populace and good for a select elite group of US and international business interests who now seek to manipulate the masses to believe ending it will be bad for them, the people.Balance is what needs to be restored and the tool as old as the nation to do such is tariffs.  

Be sure to check out the free tools BP provides to help analyze deals you may have and also market insights.

I found it far more valuable than the AirDNA one result, albeit you do have to pay for the pricelabs revenue estimator. 

I second Transunion as a decent screening tool.

What are the best Bigger Pockets tools to use for profitability analysis?  

I'm not a lawyer or anything, this is just coming from what I've learned on here, there are many valuable old threads about this topic on here like this one:https://www.biggerpockets.com/forums/83/topics/86029-subject....and this one:https://www.biggerpockets.com/forums/311/topics/183825-due-o..How is it working our for you in practice?

It has 3 units, an additional dwelling unit in the garden level, and 2 garage parking spaces (which I've come to realize are quite valuable where the property is). 

Do they want the transactional expert or would a relationship be more valuable to them?  

I am not sure what tools you are using for your cash flow projections but it's possible to have a property that does not cash flow year 1 but will in year 2 or 3 and so on based on average historical appreciation in Austin TX. 

I've done a few 1031 exchanges, they are a valuable tool!