If you are looking to just calculate profitability, set how much profit you want to make then:ARV - Purchase Costs - Holding Costs - Selling Costs - Desired Profit - Rehab Budget (including contingency) = Maximum Allowable OfferIF you cannot calculate those numbers, a spreadsheet isn't going to help you. 

I've included an example below to help illustrate this.So different lenders have different rates (which do vary even for DSCR loans) but these are factors they all consider.See example below:DSCR < 1Principal + Interest = $1,700Taxes = $350, Insurance = $100, Association Dues = $50Total PITIA = $2200Rent = $2000DSCR = Rent/PITIA = 2000/2200 = 0.91Since the DSCR is 0.91, we know the expenses are greater than the income of the property.DSCR >1Principal + Interest = $1,500Taxes = $250, Insurance = $100, Association Dues = $25Total PITIA = $1875 Rent = $2300DSCR = Rent/PITIA = 2300/1875 = 1.23If a purchase, you also generally need reserves / savings to show you have 3-6 month payments of PITIA (principal / interest (mortgage payment), property taxes and insurance and HOA (if applicable).

Here is the wholesale rate range at 85% loan to value.  300K purchase price using Jacksonville as the property's city. 

In my area specifically most investment type property listings are properties that were purchased 1 to 2 years ago.

A seller can not sign away his rights in a purchase or any other document.

Purchase price: $115 Cash invested: $17,000 This is my first fix and flip.

So it could take a decade to get to todays market rent. 2) it’s almost impossible if not impossible to non-renew a tenant, especially if you’re not an owner occupant. 3) As a seller, even if I could remove paying tenants I never would without a non-refundable payment from a potential buyer that covers all vacancies for 6 months if they fail to complete the purchase. 4) You MIGHT say as a buyer that’s worth it.

If the Tenant fails to obtain or maintain renters insurance as required, the Landlord may purchase a force-placed liability insurance policy to protect the Landlord’s interests.

Find a mentor that can help you through the purchase of your first house hack, and get something you can fix up off market directly from the owner.Use the help of the mentor to find out if it's a good deal and to help you understand if it could work.  

Strike up that your looking to do some purchases of ___ in ___ area but, struggling and need that leverage to make it happen, and who can you talk to about this right then and there today.