Help cutting down Hokkaido itinerary

This is my itinerary for Hokkaido, but it's too expensive. I have to cut some options, but I'm not sure what to cut. What do you consider the must sees and what would you cut?

1. Hakodate
- Mainly interested in Motomachi

2. Lake Toya
- This can't be cut, I have to go here

3. Sapporo
- Mainly interested in the historical village

4. Biei and Furano
- Mainly interested in the flower fields
- Was interested in Daisetsuza

5. Shiretoko
- Mainly interested in the cape cruise and national park

My friends suggested cutting Shiretoko because it's out of the way from the other places. But I thought I could see stuff at Shiretoko I couldn't see elsewhere. What do you think? Are there other places similar to Shiretoko? I live in Japan, but not close to Hokkaido at all.

Does the assessment of expenses include accommodation costs or is the travel itself that's too costly?

The cost includes accommodation. Honestly I'm surprised at how cheap some of the hotels are compared to where I usually travel to. But the trains and hotels do add up after a while.

I was interested in the Shiretoko Cape Cruise. It would be exciting to see bears from the boat even though I think it's unlikely.

We went to Shiretoko last June and didn't see any bears. However, before that we visited Sahoro Bear Mountain (http://www.sahoro.co.jp/language/english/green/bear/bear.html) which was fabulous.

May I ask what your accommodation costs are? There might be cheaper alternatives.