For example, I have been informed from a couple of banks that even though my current Airbnb totally offsets the mortgage, they will not take the income from the property towards the DTI calculations but rather take the gross income from the Taxes filed and consider the mortgage amount as an expense, which was hard to understand.

Any construction will come with LOTS of permits.I don't know SLT market, it's CA and im in NV, but I've helped more than one person sell in Incline and buy in Reno because the numbers work better for them.I suggest you look into property taxes, and tenant protections of NV vs CA. 

In July I will be receiving $50k after taxes in an inheritance for investing. 

However, the cashflow is unlikely to make up for the increased equity gains, reduced vacancies, tax deductions, and other benefits that come from diversifying.I recommend you build a strong foundational understanding of real estate investing.1.

For tax purposes, having LLC hold the title would be the ideal scenario.

But let's not forget the importance of cash flow, and the impact of federal state and local taxes on our assets and cash flow also. 

It’s heavy manufacturing, finance industry, health care, Tech Giant presence, 3 pro sports teams (and hopefully an MLB team), zero state income tax, and nearly 1100 companies have located to nashville in the last decade.

I work a fulltime job as well and make about $13000 a month after tax.

Again, I will leave the details to your tax pro.

BTW, you must get a phila tax ID first, then a commercial activity license, and finally a rental license.Hope this helpshttps://www.phila.gov/services/permits-violations-licenses/g...https://www.phila.gov/services/permits-violations-licenses/g...https://www.phila.gov/services/payments-assistance-taxes/tax...