Even if marijuana is legal in your state, you should have a policy against smoking indoors and a "right to quiet enjoyment" clause that essentially tells them to be good neighbors.I would give the smokers a written warning that their smoking is bothering the neighbors.

Does your lease have any language related to smoking indoors? 

I think short term rentals are the way to go as of now but I already see that markey starting to become over saturated, but hey if they really build this indoor water park next to Showboat we will be fine!

***NOTE: Due to COVID-19, in-person networking events are NOT a good idea right now: if hosted indoors, they are quite likely the highest risk activity you can attend.

The new NEC 2020 is out and it states (note that it is for "locations that are supplied by single-phase branch circuits rated 150 volts or less to ground are required to have GFCI protection for personnelYou have to check and see if your city/state require NEC 2017 or NEC 2020 or neither (like Phoenix AZ)  but it's good to follow the code anyway.2020 Edition: Section 210.8Dwelling Units 210.8(A)All 125- through 250-volt receptacles in the following locations that are supplied by single-phase branch circuits rated 150 volts or less to ground are required to have GFCI protection for personnel.Bathrooms210.8(A)(1)Garages and accessory buildings210.8(A)(2)Outdoors210.8(A)(3)Crawl Spaces210.8(A)(4)Basements (finished and unfinished)210.8(A)(5)Kitchens210.8(A)(6)Sinks210.8(A)(7)Boathouses210.8(A)(8)Bathtubs or shower stalls210.8(A)(9)Laundry Areas210.8(A)(10)Indoor damp and wet locations210.8(A)(11)Boat Hoist555.9Other Than Dwelling Units 210.8(B)All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground, 50 amperes or less, and all receptacles supplied by three-phase branch circuits rated 150 volts or less to ground, 100 amperes or less, installed in the following locations are required to have GFCI protection for personnel.Bathrooms210.8(B)(1)Kitchens or areas with sink and permanent provisions forfood preparation or cooking210.8(B)(2)Rooftops210.8(B)(3)Outdoors210.8(B)(4)Sinks210.8(B)(5)Indoor damp and wet locations210.8(B)(6)Locker rooms w/shower facilities210.8(B)(7)Garages and accessory buildings210.8(B)(8)Crawl spaces — at or below grade210.8(B)(9)Unfinished areas of basements210.8(B)(10)Laundry areas210.8(B)(11)Bathtubs and shower stalls210.8(B)(12)Both Dwelling and Other Than Dwelling UnitsCrawl Space Lighting Outlets210.8(C)Specific Appliances210.8(D)Equipment Requiring Servicing210.8(E) [210.63)Outdoor Outlets210.8(F)Sump Pumps422.5(A)(6)Dishwashers422.5(A)(7)Swimming Pools and Similar Inst.See Article 680* Other GFCI requirements scattered throughout the NEC.

You can look at indoor storage for RV's. 

Anything indoors it typically not a problem. 

Also mold in attic is not suppose to affect indoor air quality (stack flow effect).  

I have cash...do I start investing in doors outside of CA where $100k cash can buy me a leveraged quad, or do I put down on a high ratio loan in SoCal and buy a house for $700-800k?

When I search for outdoor storage lots for equipment/supplies to look for comps, nothing comes up except for indoor storage units.