the generic codes will be available on the generic readers, but the specific/sub codes are only available on the higher end (and with current subscriptions) tools or dealer only tools.
Dealer will likely be cheaper than the readers and current subscriptions - especially where you have two makers to contend with. You may be able to find an independent shop who specializes in your makes and has enough business to justify the scan tool needed.
Emissions and airbags are just a couple of things the Fed does not want nonqualified people futzing with.