So it's possible to rent it out for a period to make it eligible for a 1031 exchange, and still be able to use the primary residence exclusion?

The majority of investor I talk to in this market are primarily, if not exclusively, are appreciate investors.

Also you would lose your tax homestead exemption and the 131 cap gains exclusion for half of the property. 

Is there a way to pull lists of opportune properties that are exclusively in B and C class neighborhoods?

Do you work exclusively for Realestate Investors?

FarmersWhen comparing insurance policies, be sure to look at the coverage limits, deductibles, and exclusions to ensure that you are getting the right coverage for your needs at a fair price.

Two things are taken into account when determining the amount of cap gains that can fall under the 121 exclusion: the amount of time it is lived in personally and the amount of gain on the property. 

Making it our primary residence again is not an option, so no way of using the 121 exclusion there.I hadn't previously considered using a 1031 exchange to delay/eliminate cap gains taxes because I don't really want to own another rental or investment property.

Technically if your cell phone was used exclusively for business and used equally per property you would handle it that way. 

This can give you an overall idea of the mentality of the neighborhood since neatness and communal pride isn't exclusive to upper class neighborhoods.