Someone else will need to comment on the ski in aspect of the townhomes since there are roads and a big parking lot between the runs and the townhomes, but they are definitely situated to make ski-out easy. From the townhomes you just ski down the hill and catch either the Pony Express or Iron Horse lifts. You'll need to ride Iron Horse to the top to get to both Big Sky and to Madison Village, where the Moonlight Basin ski school is.
Getting to Big Sky on skis is a long, but easy traverse. I would guess it takes 10 minutes or so, I've never times it. Getting back is another easy traverse but its easy to miss the road back to your townhomes if you don't know where it is. That road will put you just below the townhomes, not too much of a climb.
I haven't skied Moonlight this year. I hear its doing okay but some people have complained that the traverses to the steep stuff in the Headwaters Bowl have been skied down to rocks. They could use some more snow.
Big Sky is doing okay. They could use some more snow but there is plenty of great terrain open where you don't have to worry about hitting anything. Some of the newer glade runs on Andesite aren't skiable and you can't go anywhere you want off Challenger or the tram, but there still is pleny of terrain open. Usually, late February and March are the heaviest period for snowfall so things should improve at both resorts before you get here.
Costco has deals on Moonlight tickets; I'll have to check to see what the price is. Unfortunately, they aren't selling Big Sky tickets this year, only Big Sky frequency cards that get you $20 off each ticket. They go for around 2 for $150 which makes them worth it if you're skiing there more than 4 days.