Not sure if you could get by with this
https://www.amazon.com/Westinghouse-iGen4500-Portable-Inverter-Generator/dp/B06XC47ZX4/ref=sr_1_fkmrnull_5?crid=1DCOKK5Y63OEW&keywords=westinghouse+generator+4500&qid=1552075513&s=gateway&sprefix=westinghouse+generator%2Caps%2C246&sr=8-5-fkmrnull
or from Home depot
https://www.homedepot.com/p/Westinghouse-4-500-Watt-Super-Quiet-Gas-Powered-Inverter-Generator-with-LED-Display-Push-Button-Start-and-Remote-Start-iGen4500/303364199?
low db level of 52 db
There are a few on here using them that seem happy, 4500 watt peak 3700 watt continuous. Someone in here may be able to tell you how to set up for a 50 amp plug.