Then they extract this equity to invest in more wealth building assets instead of paying it off completely.

If however that's not the case, obviously getting a mortgage and using your cash as down-payment is the preferred option.For example - I started with $70k, BRRRRed a rental and pulled all my equity out, which I put into another rental and I'm going to extract the equity pit of it as well.

After refi to extract investment at current rates, the RE is huge cash flow negative.  

They're also great at selling you software, more training, and coaching/mentoring....that will for sure extract a good deal of money from the participants.   

This is because at the current rates, a high LTV property (which is required to extract rehab costs) bleed cash. 

I make millions annually transacting as a principal broker and owner of my company with clients.I also run a lean operation with employees extracting the most performance per worker.Many big companies tend to hire the crap out of every position having 30,40,50 people in the hopes they keep scaling.

By trialing these softwares for a given region before committing to one you can make a direct comparison on data quality.If you are just starting out, then I'd recommend to go free first and extract leads directly from public and/or county websites.

One nice feature is that they have a receipt scanner that extracts info from the receipts, not just a static photo for compliance purposes.

However if I do a BRRRR I can achieve infinite return by extracting all of my investment.

Once again, the property appraised low at $32k so I would only be able to extract $32k out.