Electric heaters are dangerous and can start a fire if left unattended.

This will give you one critical piece of information, that it may take X days to get an offer and sell, and the second item will give you what your competition is right now.

It has come up quite a bit, still is a bit dangerous but appears to have plenty of room for improvement and appreciation.

Never invest in any city on this list of the 50 most dangerous US cities.Low operating costs: High operating costs are one of the driving factors for many companies, leaving states with high taxes, regulations, and other costs.

The PM should provide itemized items of what was done.

I'm wondering how much specifics I need to include for each line item. 

There are a lot of options out there.Some of the most useful items BiggerPockets members have identified are features that save time so they can spend time working on their next property.

Here's a https://www.irs.gov/businesses/cost-segregation-audit-technique-guide-chapter-4-principal-elements-of-a-quality-cost-segregation-study-and-report to the IRS website noting specific items that are included in the cost segregation study report. hmm, that website is a 404 error.  

After a $500 plumber bill I no longer wish to continue stressing out about this business; at the beginning (10 years ago) it was fun and challenging, now, after seen how we are the ogres (landlords in general), the outrageous government response with the eviction moratorium during Covid, the raise in taxes and insurance, service people who charge you more than a brain surgeon, the fact that this country is becoming dangerously socialist and the tenant drama I finally decided It is time to look elsewhere for investments.I just cannot find any information of what to do when I sell my properties.

Also, how old are your capex items?