I'm calculating my ROI (admittedly, a rough tool) as (rent-expenses)/investment.

I'm still leaning my way around the site and forum, but the site seems to be a great knowledge tool.

@Mike Young,It sounds like you are looking for a basic tool.  

Bear in mind that early repayment penalties can throw a wrench in the plan, so check you T&Cs with your lender before you pull the trigger - but my point is that the longer the mortgage term, the more cash flow you have and, whether you need it now or not, it can be a powerful tool for either supplementing your W2 or growing your REI portfolio at an accelerated rate.Best of luck!

https://arec.alabama.gov/arec/pages/consumer/tools...http://www.ago.state.al.us/Page-Consumer-Protectio...

If you are interested in checking out the company I am using it is called Central Business Funding, and here is there link if you want to check it out http://www.centralbusinessfunding.com/Another option if you want is to use LendingClub, https://www.lendingclub.com/ this place is investors loaning to others, just as a creative note you might even be able to network some at this site or others like it... also if you haven't read it Rich Dad poor Dad, by Robert Kiyosaki, I have found gets my brain thinking more creatively... like you could try selling somethings on Ebay, or pick up some other passive income gigs online, http://digitalsynopsis.com/tools/200-legit-ways-to-make-money-online-from-home/, found this after I read "The 4 hour work week" by Timothy Ferriss,  both books I mentioned are available on YouTube as an audio book if you are to busy to sit and read but can listen as you work .

As a electrician  and pretty handy with the tools and having done a few small renos myself, I am now looking to dive into a flip or a BRRRR.

There are tools to use like airdna.co (my favorite because they capture true rental data by individual property and location).  

It is top notch and the only tool I use unless I need to do a really quick analysis on a small property.

He sells the estimator tool from the FLIP book.