FF also requires a lot of work on your end to follow up on matched and unmatched leads.

You are required to calculate depreciation.If your net rental income is negative and your income is above $150,000 and the property is classified as passive, the excess loss will be carried forward to the following tax year.

Supreme Court's Wayfair decision, Pennsylvania may require collection and remittance of taxes from businesses that have a substantial economic nexus in Pennsylvania"But from this site, it looks LLC needs to file Penn state tax no matter its size:https://www.revenue.pa.gov/TaxTypes/Partnerships-S-Corps-LLCs/Pages/default.aspx#:~:text=Limited%20Liability%20Companies,pay%20corporate%20net%20income%20tax."

According to a Google search in my market landlords are not required to do any of the above.

This may affect value or time required to sell.7) Adding an ADU does not make the property a duplex.

In my experience, homes with window units only require a specific buyer versus having an HVAC which most buyers tend to prefer.

In Virginia you must give 60 days notice that you will not renew, check your state's requirements.

Did you include the required addendum for Carbondale? 

The cost of the materials was $1,500, and including labor I’d estimate this cost me about $3,000.The property manager never ran this by me or gave me an indication these project would be completed.Our service agreement is clear that written consent is needed when costs exceed $1,000 and in this instance these were not repairs and requirements needed to rent the property.

In a few of my markets (Philly for example), the minimum stay to be considered medium term is 31 days, anything under it is a short term stay and requires a STR license.