I have my eye on one that's in my price range. 

Bill is right about homes in that price range.

I’ve been making extra payments on my mortgage that has the highest interest, about 6.75% compared to my others that are in the 4% range.

Would I need to add a second egress to the 3rd floor for this to be compliant or would the one egress (from the back stairs) be sufficient? 

I was looking at 3/4 bedrooms new homes at the range 200-300k$.

If we were just jumping in today, we couldn't even come close to what was done when interest rates were in the 3-4% range, and houses were 1/2 the price.   

I have a wide range of property owners I manage properties for, and some are great landlords, and some just won't let me so my job and handle things for them.  

I'm with @Jonathan Greene - no, don't buy 5 properties in that price range in a random market. 

The sellers interest is the interest and transactional convenience, when a lender is involved there are costs associated that can often be rolled back into the loan provided the loan to value (LTV) based off the appraisal is sufficient. - Higher rates.

The high down payment is necessary so that the DTI ratio is within the range to be qualified for a conventional loan.