You can buy nice ones with temperature readouts and jets from the Big Orange Retail Giant for about $200.

This is similar to taking the market's temperature by looking at magazine headlines, telemarketing calls, guru sales programs, and the like. 

@Shahdan Calcuttawalla The hvac guy I use has installed 2 used outdoor units and one used system for me.

Our family loves great restaurants, entertainment, etc. and would find it difficult to lose access to that.No state income tax states get major bonus pointsWe love the outdoors. 

I can trim them back but I also want the shade since temperatures  can go up to the 100s easy especially during summertime.

Either the hot water heater is on the verge of failing or someone turned down the temperature at which the gas or electricity kicks in to reheat the water.

The concrete slab will move and shift over time - concrete actually expands and contracts with temperature while porcelain and ceramic tile do not. 

I have (for our system) water and antifreeze temperature logger data collected every hour for the past several years.

It is a large 5 bed, 2.75 bath with an large den, pool and spa and outdoor space for the kids.

Here are the knowns:Rent per tenant: $750 (this is below market value due to deferred maintenance, I believe $1,000-1,200 is more realistic)Property taxes: $900 per yearLandlord insurance: $1,000 per yearLandlord pays water/trash: claims to be $125 per month (will ask for proof)Landlord is in charge of snow removal and mowing lawnThere are 5 electric meters, each tenant pays their own (landlord covers hallway and outdoor lights)What I plan to ask for is the copies of the leases, copies of the utility bills, and copies of bank statements showing the tenants are actually paying on time.