Not only does your credit suffer but so does your reputation. 

However when the plumber was their he tried to isolate the water inlet to the condo and it wouldn't stop the water! 

But I did a walk through of the property, checked all the sinks and toilets, didn't see anything out of the ordinary, and I was going to have a plumber come and take a more careful look.I owned several triplexes and duplexes in the NYC area, and water bills for duplexes increased from $280.00/ 3-months 10 years ago, to $580/ 3-month on the last bills, and I thought of major leaks.

The judge granted my motion and I sprung into action, I called my realtor had him immediately list it called my plumber had him go over and examine and fix a few things.

Anyone in the Minneapolis or st Paul area that has a good hvac company and a good plumber? 

The bankers (yes a banker on a construction site, you don't see that every day)Now not all of us have that specific options since his balance sheet and credit/reputation could move the needle at a mid sized regional bank, but that's not the point. 

While you can find partners to take some of this weight off your shoulders, you're still going to need to put EMD down on properties (risking tons of money), your reputation on the line, your investor's confidence in you, due diligence costs (inspection, scopes, lease audits, etc...), travel costs if you're going out of state, and much more!

is there a reputable source 

You can have a plumber do an air pressure test.You could also budget for plumbing repairs and work that into your contract price.Or you could just wing it!

Should I locate reputable Property Management Co.'