I'm new to BP and still learning the site and the many educational tools available.

Does anyone know how much it costs to maintain the license is after you've received it (continuing education, renewals, etc)?

Make sure to check out Education for all your REI learning.

  (1 triplex, 1-2 duplexes, and their office building/place of work where they rent the apartment on the 2nd floor) I hope to use them as a resource as well once I have a foundation of education on my own.  

Invest in education first and foremost!

Whereas if you have it under contract and the repairs come in higher after inspections, etc, then you can ask the Seller for concessions based on information not disclosed, etc.You will get better at high level estimates with experience, but until then you have to make an educated guess and then firm that up with bids after you have it locked in.

There are plenty more resources you can find under Education from how to's, blogs from our experts and podcasts. 

They are simply administrators and processors, and do not provide any kind of diligence or IRS compliance guidance other than general education.  

Everyone said I didn't know what I was doing (even though I educated myself every night for 6 months straight to make sure this was viable).So, I cashed out my 401k, and bought my first rental

There are free online courses, located under education tab, offered on this site.