I think you are looking at the wrong places, insulating the floor wouldn't change much. 

hi all i am a new landlord and got my first rental property. tenants moved in in September and October. the first month was fine but when December hit it got extremely cold and the heating is electric. due to poor insulation in the home that we did not know about the heat has to be turned very high up to keep the home warm, however since everything is electric it is causing the electric bill to be $800. the utilities are the tenants responsibility. however because of this one of the tenants has been extremely non compliant with paying rent.

Are there any guidelines or best practices (ie: rewiring such a property would be more valuable than updating insulation).Is it something you need to ask the insurance company about to get, or is all this determined in the initial interview with the potential insurer?

This was my first investment property and I had a poor inspector who missed all the electrical and even though the roof had about 5 years left my insurance company made me do that.

Insulation paint.

Yes it's a huge problem.You should fix this correctly now.Open the walls and put in proper sound reducing insulation.

I was thinking that the very thin hard carpet could serve as a sound insulation layer, and just installing click together LVP right over the thin carpet and the thin hard stick on tiles. 

However to save money when she had the house built, she left the basement unfinished--it is just studs, insulation, and windows/doors, plus plumbing in the foundation.

Here are a few lessons I learned during the renovation, many of which stemmed from the age of the house and unexpected hidden damages:1.Damaged Plumbing: Several plumbing pipes were ruptured or severely damaged, requiring replacement.2.Termite Infestation: I discovered termites, which led to additional costs for treatment and repairs.3.Rotted Wood: Significant sections of wood in the structure were rotted and had to be replaced.4.Lack of Insulation: There was no insulation in the att Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?

Each of the 5 warehouses on this campus will require updates (construction of offices/bathrooms, roof repairs, paint, siding repairs, new penetrations for doors, updates to electrical, insulation, and extension of water and sewer).