Maximum. The maximum number of bed and breakfast rental units may be increased in the R-R, RR-H, R-1, R-1-10, R-2 and R-3 zones, subject to a major use permit, when the special circumstances as stated below exist. In no case shall such increase permit the total number of units to exceed six bed and breakfast rental units. Special circumstances to be considered shall include, but not be limited to, the following:
a. Proximity to a State highway or major arterial as indicated in the General Plan circulation element; and
b. The historical character and/or significance of the structure(s) in which the units are to be located; and
c. The character of the proposed site relative to its surroundings; and
d. The nature of ingress and egress; and
e. The adequacy of the number and location of off-street parking spaces and maneuvering areas; and
f. Provision of rooms accessible to the developmentally disabled.