They have a battery powered red blinking light to make it seem legit.

@James Masotti - BP has a free course for REI https://www.biggerpockets.com/courses/a-beginners-...Module 6 is all about financing and there is a video for commercial loans.  

Every one of these "gurus" include a wholesaling "module" in their baskets. 

Just make sure the timer batteries are changes out regularly.

If you install a forced air system you can integrate A/C as well which is a plus if you think it is a necessity or adds value.If your old cast iron radiators are currently connected to a hot water boiler and not a steam boiler you might consider refinishing them and installing new hi-efficiency modulating condensing boilers.

@Tristian Cox, You should have a large emergency fund regardless of it being in a flood zone or not.Also, there are battery backup systems for the sump pumps.

Albert Bui Pros: mentioned often on BP Cons: accounting module is very weak, expensive for small operations Cost: $1 per unit, per month plus an onboarding fee (equal to two months of service).

Albert Bui Pros: mentioned often on BP Cons: accounting module is very weak, expensive for small operations Cost: $1 per unit, per month plus an onboarding fee (equal to two months of service).

I use those fake cameras that you can put a battery in so they light up at night and I put a smile your on camera sign visible from curbside.

In NC, and may be the case where you are, the type of detector is mandated in the landlord/tenant law. 10 year tamperproof LI battery if not hardwired is typical.