For what purpose?
If for a commercial project you could get a city permit to operate from public property. I think it’s about $280 plus a certificate of insurance with the city as a named insured.
For commercial or rec you might find a private property owner who would allow operation.
Downtown seems pretty locked up by density and restrictive public policy.
Or, head to a west side park owned by THPRD, or south to Meldrum Bar park.