<human>: I am aware how ridiculous the title sounds but here's my question.  I currently have a second home in WA state (I rent an apt in nyc) with a 30yr loan at 4.875%.  My mortgage works out to be a little less than $1700 a month but I rent out the apt for $2100.  On my own, I am fortunate enough to be able to pay my rent and my mortgage so I currently pocket the $2100 directly to a checking account as sort of an emergency fund.  To be clear, I plan on selling this home in the next 5~10 years so I don't really feel the immediately need to pay off this house either.

My question is, what is the reasoning behind paying off the principle quicker if I plan on flipping the home in a few years? I'm not sure if saving the collected rent is the smart thing to do or to just use it to pay off the mortgage.  I don't plan on using any of the $2100 for personal use so I just want to be informed about what options exist.

Give me the gist of the text in a nutshell
<bot>: Should I pay more than the minimum monthly payment on my mortgage if i plan on selling the home in 5~10 years*