Some of these websites will also offer a rental estimate report for an additional cost that can help you accurately price your rental. 

Additionally - a realtor I've been working with recently ran numbers on the same place and factors in tax savings from depreciation into his initial analysis.

One additional piece of advice I have is that when you find an area of real estate that you're interested in, focus on that niche, whether it be flix and flips, wholesaling, buy and hold, etc. 

Additionally, is this a smart decision rather than a few smaller MF deals?

Renting it for a while might be necessary to offset the additional costs.

But in addition to that you don't want to exchange into a "place holder" that you shortly sell. 

I have an investor who got a tax lien property and now is trying to unload it.

I agree it does sometimes does give important additional information over what is listed in the “public” portals, it does not list the listing agent compensation, just the buyer agent compensation.

We would love to do a flip one day but I feel it is an additional risk if you aren't living close by the house  that you are flipping.   

There are additional rules relating to this, but that is the gist of it.