The EO only gives authority within the executive branch and those federal agencies. The EO doesn't have the legal weight of a law of the land. It can be rescinded by both the president and/or Congress when they provide oversight. A law of the land requires a vote by Congress to be rescinded
EXECUTIVE ORDER or EO are exclusively prerogative of the president that do not need the promulgation of congress. The president can issue EO left and right, without the approval of congress because it is exclusively intended for executive branch of the government and not the legislative body like congress. While a law are passed inside the congress for their deliverance and approval.
The Federal government will build the hospital if it is necessary and proper, because they have the Constitutional right to do what is necessary on behalf of citizens.
