I don't know what to do!

My husband has worked for the same company for 8 years. He was working in a department that required very strenuous, physically demanding work. It took its toll on him and he began to hate it. He was offered a position within the same company on a 90 day trial basis. When he was offered the position, he told me it was a $2 an hour pay cut. I re-worked our already tight budget to make it work because I knew he hated where he was at and he should be happy in his job, right? Well, he informed me 2 weeks ago that he was wrong, it wasn't a $2/hour paycut, it's a $4.25/per hour paycut!!! Now, he does have the opportunity to make commission, which is great, but even with commission, it's still a pretty hefty paycut. AND, commission is NOT GUARANTEED! When I talked to him about my concerns about the effect this will have on us financially, he just yells at me and tells me I don't support him. I DO support him and want him to be happy, but we seriously cannot afford this large of a paycut. We just talked about it tonight and he wants to use our savings account (which we have been building to buy a house) to cover the difference in pay. This will only cover us for about 6 months, and we won't have any money saved for a house. What do I do? Do I just suck it up and take on another job (I already work a full-time job, 45 hours a week) to make ends meet? Am I being unsupportive? Am I wrong to want him to stay in the position where we are financially secure?

I just don't know! It's causing so much stress between us. I'm scared for our family. And I'm scared for our marriage. Please help!