A third party will force an additional layer of accountability and precision vs. one person doing it themselves.

Just want to verify this info with you all local professional investors.In addition, are there any property tax discount programs created by the city or state available to incentivize investors to invest in philly, just curious to know as well.

Check with your employer/benefit plan, some have rules that if its not your primary residence that you need to pay back the loan within 5 years, some plans do not let you make additional payments but allow pay off in full as early as you want, also if you leave your employer anytime before the loan is due, you may have to pay it off or pay a penalty.  

I've read about an 8-11% discount from the listed price, as well as going as low as 15%, primarily on properties that are fresh on the market.

Could additional provision added to a Texas standard lease overwrite Texas Property Code 92? 

You are already saddled and stressed with debt, I don't think you need an additional dose with hard money, unless the deal is one in a life time.

I will do some additional research as well.

At the end, We rented it to the tenants we really liked with a discount. 

You have 60 days to move into the property, then must occupy it for an additional 12 months after you move in before you can move out.

Some relatively simple formulas can make it almost automatic and will suit your needs.If you want to get additional features support, my personal favorite cloud based accounting platform is Xero, but also Quickbooks is extremely popular with lots of customization options.Let me know if you have any other questions.