Given Liz Williams' skills in fundraising, grant writing, and program development, I'm estimating her hourly rate to be around $50. This is a relatively low rate considering her expertise, but it's common for development professionals in the nonprofit sector, especially in smaller locations like Sonoma, California. Average hourly rates for development professionals in this field can range from $40 to $75, depending on experience and location. Since Liz has a degree from Columbia Business School, she may have some flexibility to negotiate a higher rate, but without specific experience in high-level fundraising or management roles, I'm keeping the estimate on the lower end of the range.