A good property manger should be able to cover their costs in lower vacancies, lower maintenance costs, and better quality residents.Crappy tenants seek out DIY landlords because they know they can get away with things a good professional manager would not tolerate. 

Home depot/lowes sells mold test kits you can use once the basement is dried out.Once you have the basement dry, the next order of business is to figure out the cause(s) of the flooding, and hopefully address those causes to prevent future floods.There are multiple potential reasons for your flooding--it could be ground water rising up from underneath the house, it could improper drainage around the house, it could be cracks in the foundation or slab, it could be water coming in through the window wells, it could be all of those things, or it could be something else entirely.  

It use to be necessary as a DIY landlord to have a set cleaning fee in the lease that could be deducted from the security deposit at move out. 

Third, you aren't saving money or doing yourself any favors with DIY management.

Previous owners created a DIY nightmare.

Historically, most DIY landlords have bought Class B or C rental properties, that cashflow immediately, or soon after being properly repositioned with higher rents.

I’ve been addicted to DIY home flips for years.

I am sure plenty have tried to DIY it 

We are getting significantly more life out of our surround kits now. 

@Brian Berry as others have pointed out, you cut corners to save a few dollars by DIY managing, now it may cost you thousands.Who have you lined up to access the property when needed?