Sounds like you're new to routers in general... I'm nor aware of any "rabbeting" sets because rabbets cuts can be cut with thin bits (requiring multi pass cuts) or thick bits.
If you are new to routers - do yourself a big favor and purchase a multi-bit set in the $100 price range. As you learn to use your router, you will notice certain bits are used more often and some you may never use. As you replace the more used bits, replace those with the more expensive and better quality bits.
Its' never hot or cold in New Hampshire... its' always seasonal.