I used CSV's to import data that I needed into RM.  

The data they pull from the tax records on how much a home last sold for, often not updated, or completely wrong.

Non-passive to achieve this level of return.Add the addition of the ADU makes the main unit rent controlled if over 15 years old.the work to add an ADU likely exceeds the effort of a brrrr that can achieve infinite return  Experienced investors are adding multiple ADUs by leveraging items like bonus density, committing units to affordable housing, etc.  

I’m not focused on volume, but rather on maximizing the assignment fee per deal, compared to doing multiple smaller deals to achieve the same result.My question is: Where can I find sellers with messy titles?

Aggressive pricing is necessary to achieve this, so it's important to ensure the property is realistically priced in line with market standards, which often is not necessarily what you're hoping to sell for. 

Without the high leverage you reduce the top source of return in CA RE which is achieve via the appreciation on a high leverage property.  

Real estate is an excellent avenue to help you achieve those goals, especially since it can create both passive income and long-term wealth.

Which platform offers fresher data for wholesalers propstream or property radar.

@Abrahm Dimmitt,PropStream has a lot more data in it. 

What will be the indirect achievement that you want to achieve by using BP?