If you paid for a title policy, I suggest you submit a claim to the insurer right away. 

Probably at least 20% or more, this will help cover the unknowns and inflation.The contractor may charge you to prepare an estimate, however look at cost of the estimate like an insurance policy. 

If they are VERY professional, they will have their processes in writing as verification that policies are enforced equally and fairly by their entire staff.6.

A big one that I have seen from personal experience is dealing with certain historical board neighborhood committee's for heavy construction fix and flips.

Flood will definitely need to be a separate policy and Windstorm may be done through the State Pool (depends on location) or it may be included in the policy.

If we don't remedy, the city does it and charges the owner.Looking at Cleveland city ordinances, it appears they have a similar policy of requesting the owner to remedy or they will remedy and charge the owner.

You need do not need a landlord policy.  

If the policy is in your name but you are not on the title to the property it could present a problem at claim time. 

I would maintain a good liability policy and if a good opportunity comes along pull money out of the investment to fund the next deal!

I included some charts below.iBuyers like Open Door and Zillow, institutional investors, pandemic migration, low interest rates and government policy (eviction moratoriums early on in the pandemic) helped create the unusual sales and rental market Las Vegas just experienced.