Now he is recommending that we also air test the rest of the house.  

These courses are probably not the most exciting on the market, but I passed both without any issues.If you have already some general knowledge about real estate, you will find that it is really easy to pass the state test.

If they leave windows open or back entrances unlocked, thermostats turned way up when testing the heat, Fridges/freezers not closed all the way, Bring in 4 kids who are running around and knocking holes in walls and tripping down steps (that they later blame on a piece of pulled up carpet) it all falls on your dime. 

Since you already passed your test, I would just hang your license with an online broker and do the proper disclosures like the others here suggested. :]

We didn't choose the $499 subscription price and wanted to test it out for a year.

Apply for the test on your 18th birthday.

I have completed 2 Tough Mudders, 3 Spartan Races, a triathlon, and various other physically demanding challenges to test my limits and challenge myself. 

I would recommend posting a couple "fake listings" online to test the market. 

I mean incompetent, didn't check ages of utilities, didn't go in attics, crawl spaces, test any electrical/plumbing, didn't go on or look at roof...

I wouldn't lose any sleep about being a couple grand off on the rehab or closing costs, the real test is going to be when you attempt to refinance, assuming you can get the rehab completed.