B&H Calc Figures

[Bobby R.]

I have a property under contract and was putting the numbers in the B&H Calc.  I don't yet have the expense numbers so I guess that's why several reports are showing 19 digit numbers (analysis over 10 years, the longer the time the longer the number).  Return rates have waaay bigger numbers. See attachments.  What is causing the report to create such large numbers?  

Also, the subject property is a 3 unit on the water in Southern MD (abt an hour outside of DC). It has a assessed value of $555,000.  How do I find comps for a multi-unit?