I have sold 3 houses in my life. I can tell you that I have never seen a market like this where houses are selling for all cash the next day with multiple offers above list price and that is considered normal. I haven't seen anything even close to this. Two of my houses took over a year to sell. It sucked. It is certainly possible the market will still be good in 4 years (I doubt it). I don't know the future. But I can objectively tell you that it is on fire right now and if you need to sell, as in you need to move somewhere and become a renter because you are going to go be a student or something, then lucky you because it's a good time to sell and get your equity out (as compared to somebody who bought in 2005 and needed to sell in 2008 to go to med school or something).
I have also rented a house when I couldn't sell it. My renters trashed the place and flooded the basement with sewage by flushing towels down the toilet. I was an intern at the time and that was not something I wanted to deal with. All the money I made renting evaporated fixing that mess. The house also needed a new roof. That cost $10,000, He's talking about holding a house for 4 years while he's a student without income. Roofs cost more, insurance costs more, taxes are higher, repair labor costs more. Yeah, it's complicated. Even if he's got renters in there that don't suck (big if) and don't trash the place and pay you, it still financially may not make sense. Maybe.
As somebody who has gone through exactly what this guy is talking about -- trying to commute an hour and failing. Trying to be a landlord on a property an hour away and failing. I stand by what I wrote. Minimize distractions. Don't commute. Don't be a landlord. Move close to the university. Focus on med school. If you don't want to rent, then sell your current property and buy in town if that makes more financial sense.