My (limited) experience in the power generation industry has been that "gas" = gaseous fuels (natural gas, propane etc.) and that "gasoline" = liquid fuels sold as gasoline (gasoline, E10, etc.)
Another thought- "Recalibrate" the EMI meter to show a significant drop in level and see if the placebo effect comes in to play. The human mind is a wonderful thing, if a person thinks they should feel better they often will.
I respectfully disagree. A typical 15kVA 7200 to 120/240 transformer will happily produce 7200V as long as there is no significant load on the line when a 2kW generator is connected to half of the secondary.
Please define "disconnect it without having to use a screwdriver or any other tool"
(a) you want to be able to unplug the connectors from each other.
(b) you want to remove the connector from the wires.
I suggest a search for "SD20 2pin Waterproof Connector" if the former.
Random thoughts follow-
I would not want to be in a position that relied on a UPS to allow use of "an emergency generator".
Your gas supplier may tell you that drawing 12000 cubic feet per hour with said booster pump will
not be possible due to infrastructure limitations.
When you need fuel...
My off the cuff thought is to consult with the gas company; tell them you will need about 12000 cubic feet per hour, and then decide if it makes more sense to obtain a diesel fueled set.