Previously I'd always used Stessa, which has a great Net Cash Flow statement view, breaking down the usual income/expenses, but also includes a section for Interest/Principal, and another section for CapEx. 

Otherwise you will quickly run into scaling issues.  

The operations will make or break you. 

I actually started my own blog to break down the latest market news in a way that’s easy to understand and actionable.I pull my information from a few solid sources, including:•Florida Realtors (floridarealtors.org) – Great for statewide updates, trends, and legislative changes.

Here's BIG concerns:1) Tenant has been there for 25 years - that's a crazy amount of time2) Rent is 27% below market - why is he giving this tenant such a big break?

. ($300k has to be earned to net $250k.) so you’re looking 5 years of zero vacancy and zero capex to break even.

., I want to focus on house flipping as a way to break into real estate investing.

You are telling the tenant in advance that they can break their lease at any time and get paid to do it.

One way that I was able to get into my first property was counting 70% of the rental income of the other unit on a duplex.

In my experience many unlicensed wholesalers operate in a grey area and often cross over into what is obviously brokering real estate without a license.