The heart of what you are asking is simply whats the better use of the 126k+ in house proceeds- get the debt monkey off your back, or use the money to generate income to pay the debt monkey.
If you could get 14.3% on the 126k it would fully pay the student loan and leave you with your principle. Not a very realistic expectation is our low yield world.
So your dilemma boils down to investment quality. Same story for most of us. On that-
"This will be my 3rd property that I've purchased in in last 5 years, so
its been really cool to see how the dollars from my first home
purchase in 2017 have grown to what it is today. This is the appeal of
real-estate to me because I could never get these gains from the market."
if past performance could predict the future investing would be brain dead easy. You can't count on that same rate of return as a given going forwards. The last 3, have been some very exceptional years.
If it were me and I could get 7% on that 126k- which would be damn hard right now without more risk than I care for- I'd take it and let it pay half the loan every month. Icing on the cake would be if the asset value grew over the next 7 years as well.