There are indoor units that have plumbing to route exhaust outside and outdoor units that are simply vented.

Mold is everywhere, but there can be a health issue if readings are excessive as compared to the control sample and as compared to what is considered a normal indoor fungal ecology.

Make necessary repairs to anything damaged in the break in. Door

(its currently about 4K with an unfinished basement) and have an indoor pool, sauna, gym, and theatre (and we are planning on adding a 5th bedroom possibly).

We spend a lot of time at indoor facilities and while I'm there I always think how cool/fun it might be to own one.

In general, yes you can make them responsible for indoor plumbing, electrical, fixtures, appliances, etc.

My lease states that any "guests" that stay for more than 7 days per 30 day period would need to be added to the lease (and obviously no smoking indoors).

He is overpriced at $790k and it is a somewhat unique property for the area considering the indoor riding arena and other equine amenities.

I suggest becoming an expert in door knocking.  

I love to be active and this includes working out, crossfit (I'm not one of those guys, trust me), camping, cycling, rock climbing and indoor bouldering, networking, hiking, and anything that involves building relationships.Looking forward to diving into real estate investing and beginning this new chapter of my life!