I think most gurus are not really to good, you can get information form Google, you tube , choice books and networking.

We have to update the entire electrical throughout by replacing  the knob and tube of yesteryear to current specs.  

Working on a 1920's Portland, OR duplex with all knob and tube.

(On U-Tube in the previous week, I found 2 videos, in which the presenter in each, tells why a crash in the housing market will happen, why, & about when it will happen.

I'm doing a knob & tube re-wire because after years of handymen messing with it, I want to make the house safe for my tenants.

And I found an interesting video on U-Tube, entitled, Renting Vs.

Luckily a new metal roof was installed just before the flood of 2016, electrical was redone to remove the old knob and tube, and new plumbing to fix some concerns.

Go to a big box store or online and buy a tube or two of mouse sealing foam and the applicator gun. 

You can reach out to your local (state) Self Storage Association, peruse topics on You Tube, and certainly many, many forums here on Biggerpockets with quality folks & quality content.Regardless, of how you piece your learning together, everything (soup to nuts) for an Acquisition is FINDING, EVALUATING, PURCHASING, & MANAGING.If you think that at times it makes more sense to build than to buy, then you'll want to learn about Development & Conversions.

---------------------------------------------------------------------------------------------------------On this July 22nd, 2020, I have checked with what a Rental-owner has on U-Tube, his name being James Wise.