Best bet is likely (not absolute - everyone's situation is different) is to look at a national lender or broker that has options in lots of states - its a great development versus 20 odd years ago, with technology, internet, places like this - can have access to many more options than before (local broker or lender thats it)

Narrow your focus, stop buying properties, and figure out what you actually know really well rather than letting FOMO, spreadsheet calculations on faulty pro formas, and advice of strangers on the internet influence your investment decisions. 

To gain investor confidence, ensure the investment property numbers are real, use the most common contract forms in your state (versus a 2 or 3-page) internet/guru contract form) with appropriate addenda, or an attorney-drafted form and attorney-drafted assignment agreement.

Can any of you make some recommendations on how we can install cameras without possibly having to use an internet network?

There are a lot of shiny internet companies touting their HELOC, but you will do better with a local bank every time.

If he's he only one in the area, you could try to do it yourself by making everything automated (such as e-locks, internet, security, laundry, etc.) 

Typical on the Internet though.

Also do not take documents off the internet, get an attorney to draft documents for you and also always close with a title company. 

If I was approaching this I'd want chatbot that used the ChatGPT language model but was closed off from the internet and only trained on my data.

You may also want to get the fastest internet possible and to set up individual networks by the room.4.