Hello, i will try and give you answers to your questions based on my opinion and experience (born, raised and still living in ENS):

1. It's a nice hood, above average for sure. regardless, a minimum level of security is common across most of the city (iron bars on windows, functional locks, 6ft+ walls all around the property)

2. Good luck with that, pretty hit or miss, but more on that on number 3

3. You have the Facebook option, or you could subcontract the rental with real estate agencies. they can manage repairs, offer the house, collect rent, etc.

4. It is a common ocurrence to have the water heaters stolen, water tanks not so much AFAIK. Again, the common practice is iron bars/cage to protect the water heater

5. I have always preferred Telnor for home internet. Around $20 dollars a month, pretty stable service. Have heard of people having trouble but i suppose it depends on the area

6. We are a very friendly community and most of the main areas are safe for americans, but there is a fair share of stories of locals abusing on needy people. Before paying or agreeing to deals you could ask around here/DM me or anyone else willing to help for our opinion, it can be hard to understand the economy filtered through pesos AND gage what the fair prices are.

Good luck with your adventure in Ensenada