The Secretary may establish cost limitations on eligible activities under this part, subject to the provisions of this part.

Any entity that transfers ownership interests in, or shares representing, units to eligible families, or another entity specified in the approved application, may use the proceeds, if any, from the initial sale for costs of the homeownership program, including operating expenses, improvements to the project, business opportunities for low-income families, supportive services related to the homeownership program, additional homeownership opportunities, and other activities approved by the Secretary.