If one betroths with his portion, she is not betrothed - המקדש בחלקו אינה מקודשת
Summary:
One can be מקדש with a service which he provides (since there is a fee for the service), however one cannot be מקדש with קדשים, since they are ממון גבוה, he is not giving her anything of his own.
And how is a woman in the Azoroh - וכי אשה בעזרה מנין
Summary:
According to רש"י woman do not enter the עזרה. According to תוספות it is unusual (and disgraceful) for women to enter the עזרה to become מקודשות.