Construction is ranked only 6th in terms of the number of jobs in Las Vegas/Henderson area. Highly doubtful Vegas will live or die based on that industry alone.
In thousands, not seasonally adjusted, as of March 2020:
leisure and hospitality 290
trade, transportation, utilities 177.3
professional and business services 150.2
government 110.4
education and health services 103.8
construction 75.2
https://www.bls.gov/eag/eag.nv_lasvegas_msa.htm
Liesure and hospitality, no surprise, ranks first. No surprise there.
I don't see the hotels, casinos, night clubs, etc. being packed initially.
I suspect the most risk tolerant will venture in at the beginning. These are the people who live by the motto "Bad things only happen to others." Optimism bias.
The moderately risk tolerant and the risk averse will wait and see. Eventually, as Covid-19 becomes less of a threat, and as the hospitality industry make adjustments to provide an aura of safety, the public will return to Vegas.
There will always be an epidemic or pandemic. Through it all, one thing doesn't change: human nature.