Household dehumidifiers will likely be insufficient for this -- you'll need commercial grade equipment.To prevent a repeat problem in the future:  I live here in Baltimore and based on what I saw yesterday, I don't think a sump pump will prevent this from happening again. 

It might prevent drafts in very old windows but there are better and less expensive methods. 

Not having to live through the restoration process of sanding, staining and poly is a plus too, but I am not sure this is the right choice since hardwoods are higher value than LVT.

This is to prevent people from being cute and playing this short, 15+% return game.

Lots of factors at play that would prevent an investor, especially a new one like the O.P. from accomplishing this task.Market is hot right now.

What prevents you willing do personal guarantee if you believe the deal is so good?

My question is the following, if I buy an investment property (while continuing to rent where I live), does that prevent me from qualifying for an FHA loan later on when looking to own my primary residence?

The loan may prevent them from getting future loans, especially another mortgageIf you default on the loan and the property is foreclosed their credit will be wrecked.There is nothing short of suing you that they can do if you do wreck their credit.  

Brand new paintRe stained floorsNew Kitchen cabinetsNew appliancesNew bathroom tilesNew bathroom sink Renewed bathtubNew lightingNew door handlesNew bedroom closet doors

@Ken Nyczaj to save you some further headaches and quickly identify your water leak source, I'd suggest having your builder, or you, get a simple water pump and 50-100 ft garden hose (link: WATER PUMP) which will pull the standing water out of the area, and put a carpet fan (link: LIGHT DUTY or HEAVY DUTY) down there for a few days to dry everything out (especially your wood framing and the insulation) to prevent any further/potential mold growth.