@Mariah SanchezYeah the math for mortgage calculation is not how you did it at all.

I'm not a flipper but I think the math you did just shows the deal isn't a good one (unless the seller agrees to $425k). 

Example:  For quick & easy math, let's say an investor has a net worth of $1 Million, should they be looking at primary residences worth $300K (30% of NW) $800K (80%) and so on.  

Modern, direct vented, natural gas and propane furnaces are typically in the range of 92 - 95% efficient.Your decision on whether to replace the furnace will depend on the efficiency of the current unit and whether it make more business sense to replace the furnace or to add a heat-pump with an exchanger insert to the existing system ... and, it is (or should be) primarily a mathematical decision yielding which ever approach is going to offer the shorter payback and lower operating costs.The math aside, there will be other non-math factors.  

The BP calculator does the math correctly, the question is are you feedining it correct data.

As you're reviewing possible places to buy, do the math as if you don't live there.

I used 10% because I'm the only accountant in America who's bad at math! 

The math is easy: nothing/zip/nada/zero.Conversely, if you change your tactic and start making offers at say 75-90% of list price, and actually pick up a couple of fundamentally sound properties as a result, how will that change your overall financial picture?

Hi guys I receiving many houses on sale from my agent and it is difficult to run numbers on all of them and find a good deal so , do I need offer first to all of them and when somebody accept my offer I can run math?

Hi guys I receiving many houses from my agent and it is difficult to run numbers on each property, so how to make it easy to work with deals, make multiple offer first to all of this deals and then who accept it I can run math?