Often there are students who are seeking out housing that is quiet with no partying as well as clean and modern so looking for dorm alternatives.

I am computer science major.

Software-wise, you can combine accounting software like Quickbooks and Some tenant management software but you as you say Appfolio is manual entry but some modern software you won't have to.The important point is that you should find the right fit for your needs.

After purchase, self rehabbed by:painting the whole house, brand new floors downstairs with modern baseboards, modern appliances, brand new concrete patio, all led lighting throughout the house, new cabinets and counters in both bathroom and kitchen downstairs.

This is not rocket science.

Completely gutted the property, opened the concept, added a full masterbath and everything brand new/ up to date on the interior with modern design.

The general textbook for my class was "Modern Real Estate Practice 20th Edition"; just saw it on Amazon for $41.00 used.

ADR and Occupancy rates are more of an art than a science, but using sites like AirDNA are great places to start and then verify thru local property management or just good old fashioned research on Airbnb and VRBO for active rentals in the area.  

Here in CO we use Foremost, American Modern, and Berkshire Hathaway.Best of luck!

The House was a Mid Century Modern built in 1955 5 bed/2 bath 2,332 sq ft for $316k, one owner who didn't do any updating the entire time he lived there.