@Michael Newman ideally your W-2 job would serve dual purposes, both focused on your passion... 1) build capital and establish credit worthiness with which to pursue your passion, and 2) give you experience in a career you're passionate about. 

Please click on the links, give them a read, and share your thoughts in the comments.First is a post that I feel will help not get overwhelmed with the amount of info that is here on BP:https://www.biggerpockets.com/blogs/5868/52761-the-simple-guide-to-getting-started-on-bp The second is a post that will help get you focused with your real estate investing goals:https://www.biggerpockets.com/blogs/5868/52743-im-new-to-bp-any-advice-would-be-appriciatedThe last one is a post that will help you choose an “investor friendly” real estate agent.

I've joined the local REIA, created an LLC, and am thirsty to learn all I can about the aspects of real estate, deal structuring, and how to analyze and take advantage of situations and opportunities as they present themselves.I'm focusing on generating passive income for our family, and pursuing a level of financial freedoms. 

Fully vet both applicants and focus on the co-signer's credit report. 

Just to focus on getting my own home finished to rent it out, and once it is ready buy another one.

Please click on the links, give them a read, and share your thoughts in the comments.First is a post that I feel will help not get overwhelmed with the amount of info that is here on BP:https://www.biggerpockets.com/blogs/5868/52761-the-simple-guide-to-getting-started-on-bp The second is a post that will help get you focused with your real estate investing goals:https://www.biggerpockets.com/blogs/5868/52743-im-new-to-bp-any-advice-would-be-appriciatedThe last one is a post that will help you choose an “investor friendly” real estate agent.

I focus on SFHs.

Please click on the links, give them a read, and share your thoughts in the comments.First is a post that I feel will help not get overwhelmed with the amount of info that is here on BP:https://www.biggerpockets.com/blogs/5868/52761-the-simple-guide-to-getting-started-on-bpThe second is a post that will help get you focused with your real estate investing goals:https://www.biggerpockets.com/blogs/5868/52743-im-new-to-bp-any-advice-would-be-appriciatedThe last one is a post that will help you choose an “investor friendly” real estate agent.

(I know big mistake) should I focus on paying this off or just rent it out and let it be

This is certainly a good indicator that, at 17, you should really be focusing on the traditional priorities of young people.