Username, if you think you will be able to purchase “equity” from a “distressed” home-debtor (whether in foreclosure or not), think again. Even if the home-debtor DOES have equity, there are many pitfalls to this type of transaction, namely a few pesky “legalities,” including the ability of the home-debtor to claim YOU took advantage of him/her and legally recover title to their property.
You would do well to study these types of transactions carefully before “knocking on doors” and attempting to “jump in with both feet.”
Since you are asking these questions here in the manner you are asking them in, it is apparent that you have a lot of “studying” to do. Instead of listening to fast-talkers on infomercials selling books and CDs, I would suggest you begin your “studies” by taking RE Principles and then RE Law at your local community college.