Does that include utility service to the house, a driveway, septic and well? 

There is almost no scenario where a condo would ever positive cash flow while servicing debt, and very little positive cash flow with no debt.If your budget only allows for a condo, find a better place to put your money to work.   

It's very easy to make one tiny, minor assumption to fill in an unknown that completely changes the context and consequently the answer - I've caught myself doing this a few times.As far as the legal responsibility for the debt goes with Subject To, my guess would be that the contract basically provides a pathway for the seller to pursue the buyer for recourse related to losses they suffer from the default of the original loan, like a form of indemnification, but does not absolve the seller of responsibility for the debt.

There is no UBIT because your investment isn't leveraged with a mortgage or debt.

Virtually anyone lending HM in 07 to 09 had a lot of bad debt.

Those that own it can be harder to sell as the cash flow from the business will cover the debt service for the business, but not for the real estate.Example: I had a very high-end assisted living facility on the market. 

What if you're a cardiologist with no debt and making $250,000 annually?

You may want to research the term ' Debt Financed Distribution' Which does have a tax implication for the investors receiving a distribution.

I'm still here trying to help people and that includes you (if you are open to it). 

Debt will get paid down, rents historically will go up, and values historically will appreciate.