The goal is to utilize the current non-profit's protections and related benefits for the time being.
What protections and benefits would that be, exactly? And what would be the purpose of this “subaccount”? Understand that the term “nonprofit” is not the same as tax exempt, though many people think they refer to the same thing. If your goal is for the organization to be recognized as tax exempt by the IRS under Internal Revenue Code (IRC) § 501(c)(3), which is the exemption for religious, scientific, and charitable organizations, there are a number of rules your organization must follow to qualify. Among those rules is that the organization must be organized primarily for an exempt purpose, it must get a substantial part of its revenue as donations from the public, and the persons who organized or run the organization cannot get any private benefit from the organization (known as private inurement). The organization still pays tax on any unrelated business income (UBI) that it has, and if it generates too much UBI it will get disqualified from exemption. Note that if the organization fails and dissolves, the assets of the organization must be transferred to another IRC § 501(c)(3) organization; the organizers cannot take those assets back for themselves. For more information on the requirements, see IRS Publication 557, which you can get from the IRS here:
https://www.irs.gov/pub/irs-pdf/p557.pdf
There are some states that have a special type of corporation known as a nonprofit corporation. Maryland is not one of those states. It does have a special type of corporation for certain charitable activities known as a benefit corporation. It also has a number of laws that apply to charitable organizations (whether or not they are benefit corporations). The following page from the Maryland Attorney General may be useful to learn about the Maryland law:
http://www.marylandattorneygeneral.gov/Pages/Nonprofits/default.aspx
I recommend you consult a tax attorney who practices in the area of exempt organizations if you wish to form an organization exempt under IRC 501(c)(3). You want to be sure you don’t run afoul of any of the laws and regulations that apply to these types of organizations.