Doesn't cause trouble for you/neighbors/city/police.That's pretty much the sum of it.

In a city like Philly, you will face many challenges - you need to learn the market and know the neighborhood and the block and make sure all of your numbers are within reason, you need very reliable contractors, you need a to understand the permit process, you need to be familiar with market expectations. 

Many Texas cities are incentivizing developers to build affordable housing units, but challenges remain around keeping these homes accessible long-term.

The City of Portland, and Multnomah County are more restrictive than most of the state for instance. 

I have a city rowhouse with a 20' sidewalk and 5' wide steps with 9 treads and two 7'x7' landings.

Linking my bank account has been the biggest frustration.

Once you know how the land is allowed to be used by City or County zoning, start working to a "highest and best use" mindset where you find out how the deal can be quickly turned into money by the end user.

I'll be bouncing back and forth between the two cities over the next four months before I move in order to get life set up and trying to learn the city... and hopefully find my next project. 

Marc Mosseau was the leader at this Oklahoma City funding tour I went to and said contact me with my first deal.

I think it makes someone look foolish to state something is a bad investment in a forum where many people, operators and money partners alike, have made lots of money working together on that specific type of investment.Whereas I may not be an expert at the things that I referenced above, what I am an expert at is buying properties under market value in 5 cities in Arizona.