They have their systems really dialed in. 

He claimed there was no mold when he inspected and that the problem must've been recently due to flooding caused by us not putting in a drainage system.

It's definitely doable if you have a good system in place.

My first questions would be, are they installing "solar shingles" (which I would not recommend) or a standard solar system with the installation of the roof.

Hopefully Mom can cancel the deal on her next home without too much financial damage.A good agent makes a transaction look easy, but there's a LOT more to getting top dollar than the amateur's listing system of Craigslist, yard sign and prayer.

As Ozzy says it has a lot to do with your goals and tolerance to risk.

I'm currently a software engineer at Snapchat working on embedded systems and I also am a partner w/ some friends at a crypto fund doing ICO investing. 

Check out the nearby members and network https://www.biggerpockets.com/meet, it will help you a lot to find partners that can help you out in investing.

I have a rental property and had an a/c guy come look at the cooling system as the tenant said she had it set on 69 but was running close to 75 degrees in the house. 

Unfortunately, in every line of business, there is always people trying to take short cuts and circumvent the system.