"....a paying passenger who has been promised a service via advertising is entitled to regulatory oversight for their protection and safety - and adequate and correct liability insurance for commercial flight.
When your insurer discovers you advertised to provide a flight and accepted payment, they will inevitably void your policy, potentially leaving your estate and family penniless.........
Even "cost sharing" is fraught with risk!
Don't even think about it without a CPL and AOC authorising the operation.