We have a 30 year loan directly from Wells Fargo. They offered us the lowest on market at the time. Granted that I suspect we were Well's dream customer. We put more than 50% down payment and borrowed only a fraction of what we can afford. We had a good amount of savings and a good amount of 401k to buffer. Plus excellent credit scores and we live in Silicon Valley. I've been a Wells customer since 1991 and have several accounts with them. My point is that yes Wells may have the capacity to offer 30 year mortgage but they won't offer it to everyone and there goes affordable housing hence the real estate market. I doubt Wells would have given us the loan when we bought our first house, we had not much and borrowed to the max.