It is the most popular software in the industry and all CPAs know how to navigate it which is nice.

Airdna is your best place to gather actual numbers, although you do need to know how to use the software, as well as talking to neighbors in the same complex with a STR. 

TenantCloud is cost effective, starter property management software you are can with.

The type of business engagement and the level of interest in the counterparty or its assets influence the goals of a due diligence inquiry.For instance, a cordial agreement between a potential buyer and an experienced seller could provide the groundwork for a long-term alliance, whereas a hostile asset sale during bankruptcy would call for a different strategy.

There you go, submit your bidBut Privy already does that and few other software too.

What websites or software do you find most helpful in general when investing in real estate? 

For your question you posed, two factors would influence my decision: 1) my opportunity costs - in other words what other options do I have at the time, and 2) My stage of life - at points in my life I have been willing to take a bit more risk, and have had bandwidth to take on that risk, and others I am not so willing to take the risk and do not have the bandwidth. 

Quote from @Jay Chung: Software is a common question on BiggerPockets.

I can think of mortgage, taxes, insurance, STR insurance, water/sewer, electricity, trash, internet/cable, cleaning (can pass through), supplies, and software.

There is also a software named LandVision from LightBox that has a good layer that lights up every parcel that has traded in the vicinity and timeframe you are looking for/in.