If you want to pay cash it must be for the full amount unless you find a seller willing to take a portion in cash and then provide you with a loan for the remainder. Generally this will occur with a seller who owns the property outright and is in a financial position to take the risk on loaning you the remaining money for a fee.
You are not required to do any of the following as a buyer. It is the lender that insists on these as part of the loan packages;
surveys, depending on local
tax search to ensure the seller paid all past taxes.
search for additional leans against a property often missed on a simple title search
and Follow up inspections where needed, mold, foundation etc.
These costs are there to protect the buyer and should not be overlooked with a cash offer.