You'll want to look at any municipal ordinances. Some Texas towns restrict even use of airguns in their city limits. The second issue will be making sure a practical, safe backstop exists.
Once you've got those two solved, I don't think you gain any significant advantage from an integral surpressor on a .22. Action noise is the main place you can cut down on noise, so a bolt-action with a threaded muzzle is probably more versatile. Given ATF wait times, some of the downloaded .22 options like .22CB are probably more responsive.
Having said that, possums are generally pretty good to have around for bug control and mostly harmless.
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