The problem with all calculators and spreadsheets is that it should never be used as a calculator.

@Andrae S Wiggins recommend you upgrade your BP membership to Pro to access the BP Calculators to evaluate rental purchases.Play with the numbers to figure out the purchase price that gives you your target ROI.That's the number you'll need to make an offer at, NOT what the seller is asking.Yes, you will get a lot of rejects, but whoever said investing was easy?

If a sponsor is touting a 7.3 entry cap in a 6.4 cap market, I'd be digging really deep into how that 7.3 was calculated, and how that 6.4 was substantiated. 

One thing to be aware of is the FHA multifamily self-sufficiency calculation which determines if a property can generate enough rental income to cover its mortgage payments.

But on that note I do use about 4 different data sources for comp'ing the property's rental price estimate for my clients.Are PM companies typically open to running a calculation on rentrange for you if you intend on using their service? 

I know BiggerPockets already has a number of great calculators, but is there anything niche that people are interested in?

@David YoungTo turn your paid-off home into a successful investment property, start by formalizing a lease agreement, assessing necessary renovations to maximize rental appeal, and calculating your cash flow after expenses.

When you contribute to a Solo 401(k) as an employee, those contributions are made on a pre-tax basis, which means they are deducted from your gross wages before FICA taxes are calculated.

I only include properties at 12%+ yield which is calculated as projected income / asking price.

It is probably too complicated to exactly calculate the additional cost.