For example a company I work with right now offers a 4% guaranteed interest rate as well as a dividend 2) Dividends are not pure interest.

Mashvisor is purely to explore and gauge at a broader level.  

While the primary purpose of these vists is routine maintenance (clean/change HVAC filters, check backup batteries in smoke/CO alarms, etc.) it provides an opportunity to survey the state of the property and find small issues (the leak under the kitchen sink) before they become large problems (the students will not notice, or remember to tell you, about the leak under the kitchen sink until water drips from the ceiling below)- hold tenants accountable for utilities.  

I'm guessing the biggest pain would be at some point the batteries would need replacing.

Are you partnering with people with capital and splitting the profits or are you purely raising capital from bank loans and hard money lenders?

On his moved out day not only he left behind his boat and firewood (he has since moved those), he filled all three carts with trash.I opened up my yard waste yard and I see a fishing rod, regular trash bags, broken glasses, corroded car battery, spic and span and other junk.

You might also take this time, as a reminder, to change the batteries in your thermostat, replace your furnace filter, and clear your air vents to ensure your unit is working to the best of its ability.4) This is also a good time to disconnect your exterior hoses. 5) It is also now time to change the batteries in your smoke detectors.

From a purely math standpoint you should pay off the highest interest rate first.  

To over-simplify, if lending were as available as potential home-buyers would like it to be home prices would launch into inter-stellar space - well beyond the previously elevated values we saw before the crash - purely due to to supply and demand: supply is restricted as is growth in supply while demand is increasing exponentially. 

The ones we have used the most are Schlage models which do not power the deadbolt as they have longer battery life and their are less alignment issues as buildings and doors shift with the seasons.