I'm actually planning to sell some of my SFH and move that money to the market.

I expect a free estimate from a contrator who possibly would be doing the actual work. 

And I actually think I have as much fun finding the deals and seeing the transformation of the houses we do as I do collecting the rent checks, that it would be really hard to give that up. 2) How many of those do you have paid off, if any?

Need to be sure you include the "unknown budget" and never take the optimistic approach as it is better to have money left at the end than writing more and more checks that were unplanned for.Again, if you can walk through an actual property and compare notes with someone that does it in your area (key factor), you will be way ahead of what a generic book can give you.

Listening to YouTube big shots that have great advice on professional ways to handle problematic guests ( most are great but everyone will get bad apples), staying at the property when you have an open window of time and actually get the guest experience (this is critical), and looking at your click thru and conversion rates to get a good baseline.There is way more work to running an STR than a LTR.

I'm also thinking of turning a room downstairs into a bedroom with a simple wall.The TH is actually across from UCSD, not SDSU.  

I actually have a fee in my lease if a tenant wants me to physically pick up a payment.

There are many who preach this program but the reality is if you run the actual numbers I would argue that is NOT the case.

Although you are a new investor, you actually have more and better options than seasoned investors.Id they need a second parking spot , rent that to them also.

I actually sold a Class C a few months ago - I saw the writing on the wall after one Class C, very likely no capital gains after all my passive losses.