Apples and oranges.

I am looking at a hard money I/O loan to finance this deal.

You are just changing your scenario and comparing apples to oranges now, where earlier you made a statement as if leveraged properties are somehow immune from the same vacancy risks, and as if there is no expense there when they are sitting vacant.

Make sure to figure out their commission upfront so you can compare apples to apples.

I am hoping Apple's arrival and jobs in RTP will bring in more appreciation and rental potential to those areas.However APEX/Cary/Morrisville seem to be highly appreciated and my realtor is suggesting to buy in fuquay varina and holly springs and was saying it is very easy to rent in those areas(3br - $1600 to $1900).

@Joe B.Your comparison between the two firms is not apples-to-apples.

The only caveat will be that you will have to factor the HEL or HELOC payment into your debt to income ratios (DTI)  so make sure you do the calculation or your lender helps walk you through that calculation so that there are no issues on the upleg purchase transaction.You can take a longer term on your HEL to stretch out that principal and interest payment or use a HELOC to lessen the DTI load since HELOC's typically are interest only(IO).

Also should I worry about reviews on the apple app store? 

There is always going to be a lot of nuance to comparing "rates" since there are a lot of factors when comparing rates for a specific scenario so comparing can sometimes be apples to oranges. 

My wife is in a starting position at Apple, and she has a strong chance of being promoted within the next year or two.