I think you guys misunderstood me. Your clients can have loans with whichever lender. That doesn't matter. The value proposition is access to debt capital markets once you have critical client base. Access to US or even domestic debt capital markets will give you better pricing. Your client would need to be willing to switch from existing lender to a bondholder to get cheaper rates.
Eg say I'm with ING for my current mortgage, paying 4.13%. My broker comes to me and says how about I switch to a different "lender" at say 3.90%. Probably won't be able to offer features such as offset and ATM access, but if the pricing is compelling, you might.