We instructed her on how to turn off system and requested se let us know if leak continued(we are in Missouri .. rental is in Florida..)A week later we called her and she said it was dry  .. on January 17 tenant called and said the city called her to report heavy water usage. my husband (a plumber) drove straight to Florida and upon inspection found a stress break in pvc pipe on main water line that goes into house (located the break under grassy side yard ) He said that kind of crack was from a heavy vehicle parking or running over that area.

As such, it undergoes very large compression/expansion based on how dry or saturated with water it becomes.  

What happens when the wells dry up? 

If I'm seeing this correctly, I would take care to completely fill the space between blocks with mortar or epoxy to keep water out.I would also thoroughly dry out the crawlspace. 

My hour long, google search has, dry, there are some similar post from about 10 years ago in BiggerPockets, but don’t answer my question.

@Jose@Jose Gonzalez I have owned dry cleaners and have friends that sold theirs.  

my qiestion...can i just go in myself, tear out all of the walls, and put up fresh dry wall and flooring?

Now this has definitely turned out to be an exceptional deal, likely a large percentage of that being due to luck, I will post some numbers below in case anyone else is looking at this path.Location: Saskatchewan, Canada. 142 acres grain land (dry)Purchase price: 170 000 (believed to be far under market value, more on this later)Closing cost: 2456Down payment: 42 500, mortgage 6.09% on 25yr amortizationProperty tax: 725/yrAnnual rent: 85/ac x 142 = 12 070Cash flow: 1403/yrThis may not sound like great cash flow, but typically how farmland rentals work is the farmer leasing the land pays the entire year upfront before seeding in the spring and leases tend to be 3-5 years with rental increases built in much like a commercial building.

How about if your rental has an oil heat system and you are concerned they will consistently run the system dry.

I had a foundation problem in my home, mostly during the summer, in Flower Mound, TX due to the drying out of the ground there.