Looking for ideas and/or suggestions on recommended real estate apps, tools, or software to utilize. 

This will be determined by normal market supply and demand - and researched through property managers, or various online tools that all seek to understand comparable units for rent in any given neighborhood.3 - there is no "right" way to calculate return on investment (roi) - it varies with the property type and your investing goals.

There are some pretty nice discounts on many products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/proThe site has quite a few tools that can be helpful for new members.

It's a fantastic tool. 

My firm, for example, accepts spreadsheets, expense tracking apps like TaxBot or Expensify, accounting software like Stessa (free and relatively easy) or QuickBooks (the opposite) and so on, but we need to make sure that these tools, including spreadsheets, are correctly used.

If you haven’t been to it already, the Bigger Pockets blog features links to their fantastic podcast and many great articles: https://www.biggerpockets.com/renewsblog/The site has quite a few tools that can be helpful for new members.

The site has quite a few tools that can be helpful for new members.

Been looking at properties in a few different cities and could use a solid rent estimator tool.  

I think adding better tools through technology to an old trade is a good thing for both consumers and investors over the long term.Are iBuyers for Most Consumers?

You have a set of knowledge now that is invaluable to multifamily investors so you can easily leverage that into partnerships and your own scale-up by just adding value in Masterminds and with other investors.