This is off subject a bit but because it has a funny side and a Dead serious side, I bought this Old 1936 House , its big it was moved in the 50s , ok I come home one rainy night and put the Key in the Lock, I get a s...

There are a lot of factors that come into play like how old the home is, home close it  is to a fire station, how the home was built, how many levels, the value to rebuild, will there be an alarm system, etc. 

If the tank busts, it detects water and then sounds like a smoke alarm, I do this so it makes my tenants aware right away so they can then shut off the water.

@Christine Kankowski I'm in the @Michael Seeker boat as my PM does quarterly air filter replacements and usually will annually change out things like a smoke alarm battery. 

Third, transferring propererties *can* raise alarms at the bank.

The U&O report I was given in due diligence enabled me to then budget for the renovations accordingly - which I don't anticipate being too bad (Many of the changes were building code related, smoke alarms, etc) I know it would depend on the property however!

Also if it’s a 3-unit property and up you will have to have hardwired fire alarm with a station and fire extinguishers in some areas.

They use cell service so you don't need an internet plan on top of your alarm plan, and with Simplisafe there is no commitment.

because I didn't want a thief to get a lay-out. 

You can then give him access to remove his belongings.You may want to beef up your locks, install a audible out side alarm and motion sensor lighting as he will likely break in and steal back his property.