A all in one tool that every real estate investor should have?

Many lenders, including my group, offer a DSCR product to refinance on the back end as well.Before taking out a loan for a BRRRR project be sure to calculate all carrying costs (taxes, insurance, utilities, HOA, loan interest, etc.) to ensure (i) you have sufficient cash to cover monthly payments for at least the duration of the project and (ii) your estimated rent after repairs is at least 1.10x PITI (monthly refinance loan payment principal and interest, taxes and insurance).We have a proprietary BRRRR cash flow calculator tool that we share with our clients to help reliably assess costs and returns for these types of projects.

From my experience, multifamily rentals often attract tenants who submit maintenance requests for minor issues since they usually lack the tools or experience for basic repairs.

I want to use the bp tools to make a good presentation to market it to buyers.      

A licensed HVAC Contr will have the right tools to test the lines and set the refrigerant levels correctly.

Benefit: Defers capital gains tax, allowing full reinvestment into a new property.2 very powerful tools! 

What tools did you use to decide if this home would make a great mid term rental?

Quote from @Colton Carew: BiggerPockets has a Lease Agreement Package under "TOOLS" at the top of your screen. $100 for a lease and several other documents (FREE FOR PRO MEMBERS!) 

Lastly, you can use the find a lender tool up top of BiggerPockets to find reputable lenders. 

We have a great tool that provides estimated monthly rent, which you can use in your calculations.