This used to be done in newspaper classifieds, but you can do it online for free now.  

I did real estate school online at night after my normal job, and eventually got my license 3 months later.

There are online sites like auction.com and Hubzu.If you are referring to sheriff sale auctions, your local county in New Jersey holds them.

We've bought from some online auctions which is a much different process than the courthouse foreclosure auctions.

Go online and look for properties that you feel you can afford as a flip.

The MLS is an underused source of deals… about 1/3 of our deals are sourced from the MLS.Auction.com: online auction website, we check on this site dailyHubzu.com: online auction website, we check on this site dailyExpired short sales: this list will come from the MLS, short sales are an excellent investment opportunity; find the listing, get a name & number for the Sellers and call them to see if they would be interested in trying again (this is how we brought 356 Chestnut St.

Any suggestions on a free or low cost program/app to collect online rent payments from a 9 unit commercial building?

I've found some related articles online but would love to hear about the experiences in the knowledgeable BP community.

Check out other online guides available here: https://www.biggerpockets.com/guides3.

Find a guy online named Ricky Carruth and you will be shown the way.