Some items might hold more weight than others, but you guys should sort through that together.You also might just do the partnership deal by deal - sometimes jumping into a partnership before you have officially worked together is NOT the best idea...

Don't split the work between multiple contractors if possible, finding one to do all or most of the work will keep prices down.Challenges were finding replacement pieces for certain items as manufactured homes were very different than stick built as well as going through state guidelines for affixing the house to the land

If there are items of value left behind, or even personal items of sentimental value, I will follow the abandonment rules to a "T" to avoid any legal issues.

RM is plenty robust to handle the items you mentioned.  

Look for a place where you can secure items that you do not want tenants to have access to. 

I am also doing a live in full renovation for a long term rental where I am project managing mechanical items and doing a lot of the interior renovations myself. 

Evaluate the depreciation of each item separately.

You can see these charges added into your payoff demand by line item.

I just go in at the first of every month and code each line item to the corresponding property and note what the expense was for (Repair, HOA Fee, Mortgage payment, etc).

Often times they come back with a list of repairs that they would like to see to protect the home or mitigate liability. 90% of the time those items were on our list to fix anyway, and sometimes we even haven't done before we get the letter from the insurance company.