It will probably depend on your experience and connections with lenders.

Depending on how bad it gets the fed will step in and fire up the money printer, of course that would be after a big bank fail and/or massive layoffs.

When I pay the mortgage the normal way (and remember, I did this for years, so I know that depending on other bills, I'd have $5-$6K in checking pretty consistently), I'm paying about $20K in interest and taking about 2 years to pay down the first chunk of $10K on the mortgage.

In any case, I thing your investment are pretty solid and should earn you something between a decent return all the way to a spectacular return depending on the local economic situation.  

Depending on the location and the city, these could take a long time.

If you did a cost segregation study on the property in the past, you may have to recapture the depreciation taken in the past.capital gain tax rates are 0, 15 or 20%There is also a potential 3.8% Net Investment Income Tax.Also, don't forget state income taxes depending on what state the property is located or your state of residency.Best of luck!

I think it depends on the individual and opportunity.

@David Sohn It depends on what your purchase price is.

Depending on your practice size and income level, you may just want to start with maxing out 401k and also adopting a defined benefit plan before committing to becoming a lifelong real estate investor.  

I know conventional lending could become an issue depending on the condition of the property.