This is about your risk tolerance, no one can tell you the "right" answer but yourself.Putting 20% down on a primary residence is a safe bet.

I am betting on income not appreciation in this market.

@Teho Kim, local/regional banks and credit unions are usually your best bet.

If so, I would very strongly consider the merit of taking on $300k in debt in order to achieve this level of earning potential and perhaps explore cheaper ways of attaining this education.Rather than thinking about how you can mitigate a poor financial decision through real estate, I respectfully suggest that perhaps it's better to not make the poor financial decision in the first place.  

He also made some very poor investments (stereotypical bad Dr moves) such as a spec-home flop, land purchases out of state and scammed by a con-artist advisor for about a $1M (guy went to jail, not sure about $$ recovery).

correct - your fha loan will drop the MI soon  .....HELOC is your best bet ....most lenders want scores > 700 for  helocs ...make some inquiries  and make sure to mention  the mod and the solar panels  when  shopping for  helocs ....I would also  recommend  getting the  heloc in place for the highest amount you can  

LibertyShare or other Health sharing ministries are a good bet.

Kiyosaki's Rich Dad Poor Dad that made me want to pursue investing in real estate (build assets, not liabilities!).

As others have said, your best bet is to find something you can get well below ARV, rehab it, and then rent.

If the mold remediation company performs the test you can bet they will have a terrific, expensive plan for you to get rid of it.