If they really want them out and no one else will bother, I'd charge at least $50 to at least cover some of your hive costs ( I do this professionally and charge much more than that ). I prefer to wait until temp's are staying in the high 50's before doing removals Taking the bees out isn't really that hard but it does take basic carpentry skills to get them out without making the repair harder for the next guy or causing more cost for the homeowner. It's hard to say how large it will be without knowing when they moved in. If they moved in during the early nectar flow, they can build quite a bit of comb. At this time of year you may not see a large amount of sealed brood or open brood, open brood will chill quickly. If they haven't been raising a lot of brood, then there will more than likely be a lot of honey in the combs, provided they had time to build up enough stores to winter on properly. I would take at least 2 deep bodies and 10 frames, it's good to bring a queen clip also.. A bee vac is "worth it's weight in gold" when doing cutouts but I have also used a brush. Start cutting comb from the outside combs and work your way in, checking each comb for the queen as you go. I would expect the bees to be a bit more defensive at this time of year. The best way to learn how to do cutouts is by doing them just be aware of which way smoke will drive the bees if using it.Remember, the less smoke the better! I can usually get by with a puff at the entrance when starting work but sometimes the bees decide differently! Always be on the lookout for the queen, catching her makes the job much easier. Good Luck.
"Of all God's creatures, only the honeybee improves its environment and preys on no other species."--Haydon Brown