Add another $20 a month for that.Add in HOA fees ($300 a month; shown in your link), Gas, electricity, high-speed internet, water, trash and snow removal. 

It goes in much faster and is more water resistant. 

I had some minor water leaks and some subfloor issues that overall did not amount to much, but I had to have an vacancy to fix later.

We couldnt have a large hole in the ground fill up with water that we were going to place a septic tank in.

Make sure that this won't put your future buyer in hot water with the VA or his lender. 

I hate to see  new members being shot down when they dip their toes in the water.

This was after the foundation was given the OK by 2 separate inspectors and occurred due to lack of support under the house, soft soil in Florida, and lack of gutters to disperse rain water from the foundation.

Inflation, cost of utilities (water/sewer), maintenance, and market rental rates.

Where is the water flowing when it rains?

He installs our water heaters for $260 + the tank.