I have had great success with French Drains (google) I had a property in Ca and sometimes it rains furiously there and water would literally pour into the basement like someone turned a tap.

You'll need to run sprinklers throughout the house (costly for a number of reasons, especially if you have to increase the water main size), have an enclosed trash area with a drain, have electrical exist signs at the egress points in the house, and they will ultimately require you to become ADA compliant.

(Yes, I know how to vet PMs.)Lots of CapEx in the past two years, mostly updated units.New roofs / new plumbing in most / new HVAC / etc.)Block bombproof constructionProperty has been cranking out greatly increased cash flow each year.2016 - the true net after ALL expenses, management, and repairswas about $800/month2017 - the true net after ALL expenses, management, and repairswas about $1,200/month2018 - so far this year, the true net after ALL expenses, management, and repairs is about $1,600/monthI have actual bank statements / tax returns / P&Ls to verify all of thisMany tenants have been there for 5+ yearsVery low vacancy rateAll tenants current on rentThe negatives:Neighborhood is terrible.

Their office was in the same town, a few blocks away.

only 4 of us were at the auction Went down in the basement and one of the walls holding the floor joists had a 3/8” crack half way up the block wall spanning the entire length of the wall.

America.but must air seal as it will bring warm air from conditioned spaces to basement. dehumidifier produces heat as by product, and takes more electric to operate. if go with dehumidifiers get large comm heavy ones with humidistat and direct drain. no one will walk away with it. 300lbsdont just open window unless dry air cat 1 wind blowing straight in.it wont remove moisture only feed it. i use activtek  air scrubbers secured to a bracket holding plate. it kills protects 2000-10k sqft of mold bacteria, and reduces moisture as its byproduct of technology esp basements.

With that being said, germantown is a block by block neighborhood.

The agent said that he may have heard that this was common for the entire block. 

But if you are planning to do as part time projects, I would request you to be expect lots of road blocks and dips along the way.

We bought a $189k property for $7500 down, drained everything we had and did It.