housebank什么意思？

文献《Relationship lending and SME financing in the continental European bank-based system》中有一词housebank，谁知道是什么意思？
Elsas and Krahnen (1998) and Elsas (2005) argue that relationship lending does not depend on its duration or the existence of other lenders financing the firm, but rather on the housebank status of the lender. Housebanks often serve as a prime example of
relationship lending (Edwards and Fischer 1994), and they are considered to be the firm’s main lender, with the capacity to generate more and better information
than other financial intermediaries. Thus, we hypothesize that housebanking relationships will improve access to financing and at the same time reduce borrowing costs.

housebank意为房屋银行或是公司银行。
房屋银行，顾名思义，就是老百姓像去银行存钱一样，把手中空闲的房屋存入我们的房屋银行，每月无论您有多忙，无论房屋闲置与否，都可以从房屋银行里准时拿到固定的租金。

但现在客户的银行账号有的超长，高达28位。有没有什么变通之道？？