Please explain how a sub 2 works. in detail if you can. thanks for any help.
Read the articles on this site.
http://www.reiclub.com/real-estate-articles.php
Look on the left side of the link above, scroll down to “subject to”, there are 10 articles. Then on the right, Look for "John Cash Locke, read his articles. Good luck.
Read as many articles as you can, they cover damn near everything you want to know about all aspects of investing.