If there is a well house, tenants are tempted to store chemicals and oil near the well head.  

I had a lot of stored in the basement and was going to be moving it upstairs I just hadn’t done it yet.

I personally would assume he would include new breakers on a job to replace old panels but in the store, the panels are just panels.

There is a fairly substantial section specifically on vetting contractors, how to hire them, how to pay them, how to keep them honest, etc:https://www.biggerpockets.com/store/long-distance-real-estate-investing-ultimateEven though you won't be long distance, the entire process he lays out still applies. 

We buy used fridges from a local used appliance store.

It is just a cinderblock warehouse (5,000 sq/ft) and 2,000 sq/ft of office space.

Again, that's a question for code enforcement, but if its a short period of time and doesn't look unsightly, you should be ok to store it there.

A landlord must send notice to a tenant that includes a detailed list and description of the property, the location where the property will be stored (and possibly storage costs if incurred) and a time frame in which to claim the property after which how the property will be sold or disposed of.

Off site you get them from cabinet manufacturers or home improvement stores.

I don't read very fast and I find it even harder to store information, so the repetition of information is extremely helpful to me.