Derry, New Hampshire is a medium-sized town that is growing quickly, which is good for real estate investment opportunities. Here are some pros and cons to consider when considering purchasing real estate in Derry, NH:

Pros:
- Growing town: Derry's population has grown by approximately 15% in the past decade, signaling a growing demand for real estate in the area.
- Strong economy: Derry has a strong local economy with several large corporations in the area, which could provide opportunities for jobs and stability.
- Reasonable home prices: Compared to other areas in New Hampshire, home prices in Derry are reasonably priced which could make homes more affordable for buyers.
- Low crime rate: Derry is considered to be a safe town with lower crime rates than other areas in the state.

Cons:
- High property taxes: Derry has one of the highest property tax rates in the state of New Hampshire, which could significantly increase housing costs for homeowners.
- Limited public transportation: Derry does not have a reliable public transportation system, which could limit accessibility and mobility for potential residents.
- Harsh winter climate: New Hampshire winters can be harsh and long, which might impact the quality of life for potential residents.
- Growth could slow down: While Derry has experienced growth in the past decade, it is possible that the growth rate will slow down or even stagnate in the future.

Overall, Derry, NH has several attractive features that could make it a good location for real estate investment, although some potential downsides may need to be weighed against those benefits. It would also be prudent to conduct thorough market research and analysis to determine if Derry is the right market for your investment goals.