My goal is to build up enough cash flow with adding additional rentals(15-20 rentals paid off) to one day being able to afford a vacation rental and renting that out until I’m at retirement age.

Doing all the valves at once may result in a savings to the cost of the checks but it also prevents taking care of one in August, 2 in October, 1 in December, etc.Get them on the same schedule and find someone that will provide a bulk discount. 

Additionally the subject property is a split foyer while all comps are bungalows.

We ripped off the "indoor jacuzzi room" and breakfast nook because they were horribly done additions that were already falling off the house.

That's usually a discounted price to attract buyers.Two, a shortsale means that the owner owes more on their mortgage, plus penalties and fees than the house is worth.

I’m an investor in Atlanta Georgia  and I’m used to getting rehab quotes from GC’s that are between $35/sqft (not too much walls need to be moved or roof or anything) to $65/sqft (everything needs to be done) to $85-$100/sqft (new construction or additions).I read about and have ran into other investors who say they can do a full rehab project for about $15/sqft !!!!

Just a reminder to check and see if your taxing authority gives you a discount for paying by October 31st. 

@Anthony MikolichThere are several banks that do HELOCs on Investment Properties.The one that I know is East West Bank: East West BankI understand there are a lot of suggestions to do a refi, but there are two problems with that:1) That's not what the OP asked and 2) There are REAL reasons why to use a HELOC... which is why it's a Loan Product that is available.HELOCs give you another choice to use money temporarily and is better than HARD Money.I will wind up getting huge discounts on properties with an All Cash Offer.The discount I get can be upwards of $100k on a $1.5 Million property.BELIEVE ME.... it is worth it.

Feel free to reach out if you have any additional questions.

Additional units in rentals and removing walls in flips.