Obviously free means free so it's not the best source.

Those lenders that have in house money or access to alternative sources are going to grow past their competition in these coming months. 

I can set these people up on automatic MLS emails so that they get emailed the moment a property in their search criteria appears on the market, but I've found if I present off-market deals, they will eventually find the source of the off-market deal (often a wholesaler) and just go direct to him/her.

Hello,Just prior to this post I was trying to find any good forums on List source, but it wasn't really answering my question.

what other income sources do you have / how would you finance the new new property if your credit is bad? 

Zillow will show the source of the sold amount.

And as long as the sellers are using agents... that pretty much locks most buyers into using agents, too.I've said before that if there were ever a truly definitive tech source for appraising properties, that could be a game changer.

Thought I should crowd source this one.

But if I borrow from a specific source, my HELOC, only then I cannot deduct the interest?

Regarding your questions, in my opinion, you should look at your HELOC as one of many funding sources  & for every deal you should analyze which funding source (cash, your HELOC, refinancing one of your other multifamilies,....) is the most effective to use.