This is mainly a question for the board of directors, not any paid staff with a financial interest in the issue. I see that the budget, which has not yet been approved, envisions paying $50,500 for "Contract Services (Executive Director, Fundraising Consultant)".
The board may have been told by the incumbent site developer that his services cost that much. However, has the board not considered that a team of passionate volunteers can produce the necessary upgrades for substantially less money, and that compared to some other community-driven hospitality exchange sites WS’s proposed budget seems exorbitant?
Consider how the new hospitality exchange community Trustroots has evolved remarkably fast in little more than two months on the basis of volunteer effort, and to support a recent hackathon less than 2000€ was raised to great effect, a far cry from the $50,500 proposed for WarmShowers. (Incidentally, while I am not personally a fan of Trustroots, I’m quite sure that Trustroots could entirely supersede Warmshowers within a year or two if its developers simply add Cyclists as one of the planned communities. WS therefore ought to be redoubling its efforts to retain the trust of the membership.)
BeWelcome’s main page is currently showing that it needs to raise only 1620€ to meet its expenses for 2015. BeWelcome (or rather its umbrella BeVolunteer organization) is also legally registered as a non-profit with all the obligations that that entails, so evidently non-profit status should not lead to substantially higher demands for donation.
Instead of trying to raise a substantial sum of money to pay the asking price of a professional developer, why has the board not learned from similar communities and attempted to diversify the pool of volunteer developers?