Our plan is to install ~600 indoor, climate controlled lockers.

In my area, our off-season is January 2 - March 14, so I appeal to former guests with a significant discount, and I have compiled a list of activities that are still open during that time, for example, cave tours, zip lining, hiking, and indoor rock climbing wall, to name a few. 

I've decided my first thing to do will be to talk to the current landlord about this issue and see if he has had issues with this happening, or how he has addressed the indoor smoking, if at all. 

Because of this the contractor will be forced to replace both the indoor and outdoor components as well as the copper refrigerant lines connecting them.

If your lease has something like this, a kicked in door could let in a lot of rain which would cause massive water damage, or let in rodents, or whatever else.

I priced a goodman unit for like $700).Now, I don't know if the indoor coils I have are any good...

Basically the property has an indoor pool and hot tub.

Our tenant has paid his rent and seemed good thus far, but on the refi we did recently I found out before the inspection that he has 6 cats (3 indoor, 3 out door) that were trashing his unit.

Also, if you have a double garage, you can use half and charge another $50 for whoever wants to pay for indoor parking. 

Essentially, your cash flow becomes dependent on the behavior of housematesWe have residents decide who will pay each bill, e.g. power bill v internet We also have house meetings, facilitated by my wife, where we divvy up chores, determine if shoes will be worn indoors or not, when things can be quiet v noisy, etc.Best wishes to you