Alternatively you could use Section 179 expensing here as well, but the expensing can't create a loss for the rental and may be carried forward.

Lender will want to see a copy of the NOTE as well to use your payment in debt to income on your new purchase. -401k Loans are a fantastic place to get access to short term funds.

On average, the profits from such a strategy might be higher in Boulder than all but a select few markets in the country (maybe certain parts of SoCal offer slightly better opportunities?). 

@Grant Jordan Ward well this is facinating.

Now it's just about bringing as little money to close as possible and cutting my monthly payments down, which this loan product does well on a level I haven't seen elsewhere!

All of which are well documented on the forums.

That's a great book, I think it goes long well The E-Myth by Michael E.

Definitely want to consult a title attorney on that, but this is why I tell people to go with large well funded title companies rather than the cheaper local ones. 

You have done well thus far but in order to continue to grow you will have to grow past your limitations, TIME and CONTROL.

I look forward to learning and gaining knowledge.