I sold lodging at the Bush for 5 years. If there are two of you you can stay at the Sugarbush Inn(nice place),includes great breakfast, for $60-70 per night per person. Includes lift ticket for both MRG and the Bush the Sunday and Monday night. The weekend nights will be more.
I like to find a place with a kitchen as it's worth the extra bucks but you save on food costs. If there was 4 people you could get a really good package deal on a 1br condo with sofabed.
There really is not any dumpy cheap places. Check the Garrison as they might have a decent price. The Eno Lodge in Montpelier(40 min to both MRV and Stowe) is cheap but the money your going to spend on lift tickets will make it more expensive than a package.
The offsite ticket thing is great but if you buy a multi day lift tik at the mountain it comes out about the same.
If you really want to save money there is an all year round campground in Stowe.