We dealt directly with the seller who found us via online search for "cash for houses".

Usually, the excessive moisture is caused by a leak in the plumbing system underneath the floors and it is usually a hot water pipe leaking.I am a contractor and sometimes I find that the clothes dryer vent is broken somewhere and all the steam coming from the clothes as they dry is going inside the house and collecting on the cool glass windows.You can hire a contractor to look for a leak, or you can purchase a hydrometer online.

As others have noted most counties have online tax estimator tools you can use. 

You can look up his case online.  

Just because you found some listings online doesn't mean they are operating legally.Free AirDNA is a great starting point, but it can't give you all the answers. 

You can find them online.

I've seen two different people use RTA Cabinet store online.  

I kept plugging away,  looking online at properties, using the rental calculator, going to see the properties either virtually or in person and then if feasible making an offer for 60 days or so.   

Just in the process of listing our first rental online for the first time.

I have isolated all the water lines for my units but haven't figured out if I should call the water company and have them sell me water meters or if there is a water meter I can buy online that possibly hooks up to wifi to report usage.