save funds for future purchases or pay down loan faster

[Steve Kirsch]

Hello BP family,

How do you determine how much of rental income from doors should be applied to the loan and how much should go toward the next down payment of another property. If I have extra funding, should I apply that to the loan balance or again, just save for another door. I presume at some point, it is beneficial to pay down the loan. But when?

thank you