Andrew;
Define "super expensive"... What is affordable to one individual may be out of reach of another.
Your initial posts to the forum inquired about a LOC IV to allow you to obtain your L1 cert. Subsequently it appeared that you came to decide that flying the rocket (or any rocket) on 38mm motors would be too costly, and you began inquiring about Estes rockets and other Low-power options. Now you are back looking for a rocket capable of being used for both a L1 and L2 certification.
A quick search of Chris's Rocket Supplies shows that an Aerotech "H" impulse reload is going to cost you approximately $40 per flight, not counting the cost of the hardware, and it only goes up from there (an Aerotech "J" reload in 38mm is on the order of $80 per flight, and will require different hardware than that of the "H" motor).
Apogee Rockets/Apogee Components web site allows you to shop rocket kits by 'genre', many of the other manufacturer web sites offer you the ability to filter their rocket offerings based on body tube diameter. Level 1 certification requires that you fly an "H" or "I" impulse motor, Level 2 is "J", "K", or "L". Look for references to those impulse criteria in the model rocket description. This is one aspect of the hobby that is not rocket science...
Model rocketry is multi-faceted, with a variety of options. You can fly low-power models seeking to extract every last bit of performance from those smaller motors, you can build models which are representative of actual rockets, futuristic space vehicles, rocket gliders, etc. and of course high-power rocketry. Bottom line is that the hobby is what YOU make of it. Decide what interests you, what YOU can afford, and then use the resources at your disposal (and your time) to investigate and pursue those aspects.