If you want a quick reference with a few entries and a few clicks, Rentometer.com as a starting point will save you time especially if it is in an area where their data is up to date and has no issues.The thread is almost 2 years old so I imagine they have improved since.You can refer to the thread for other opinions and other tools/sites that were mentioned.

I think that the Birdseye tool is very useful when you need to view a potential investment property thru your search engine.

Yes there are programs that allow you to cash out refi with only 30 days seasoning and if you are a business owner there are also business financing tools you can utilize to buy these low priced houses and pay them off within six months or so.

My suggestion would be to use the tools available on here to the pro members to help you make your first purchase determinations.

If you're looking for a [supposedly] great budgeting tool, I know that Dave Ramsey has an app-based solution called Every Dollar.

I have all the tools, manpower, and experience.

Podcasts are a great tool to listen to while driving.

I'm always happy to help point you in the right direction for resources or tools on BiggerPockets that can help you with your REI goals!

I use a PM tool that allows me to create invoices and intake requests from tenants, but it doesn't provide an overview/snapshot view of these types of items.  

She would be in the 80ks if I didn't use real estate as a financial tool.