Once the sheriff completes the eviction, they can regain possession and ensure the tenant vacates.It's always a good idea to consult with a local attorney to make sure they are fully compliant with Pennsylvania’s landlord-tenant laws.

Now there should be a time limit for them to give your 1st month rent before they get the keys and take possession.

They should be responsive and communicate clearly, possess a strong understanding of the local market, offer reasonable rates, and support borrowers throughout the process, all while ensuring legal compliance to protect your interests.

The 10% is probably for ordering items and being there when goods arrive, unboxing and removal of packing materials, assembling any furniture that needs it, placement and moving things around, putting up artwork, and washing new plates, silverware, cooking pans, coffee carafe, prewashing all sheets, towels, and linens etc. 

They can ask you to serve notice so one unit (or both) are vacant at the time of possession, but if you agree to that make sure you have a large deposit and some of that is not refundable if the buyer backs out as you will need it to cover the lost rent.

Primary targets are located in cities (100k+) with positive population growth over the past five years; possessing easily identifiable macroeconomics. 

But in my neophyte view, the answer to your question is possession of something that there is higher demand for than there is supply.  

I would like coverage starting from the time I take possession, during renovation and up until the time it sells. 

It makes sense, most have no credit, no balance sheet yet  possess this desire to own real estate with no proper direction or understanding of the business  and this is the unfortunate outcome. 

If the seller is still on the property after you close (you negotiated delayed possession), I wouldn't be opposed to doing exterior work (roof, landscaping, concrete, etc.), but I wouldn't do any interior work.