How long have you been shopping with your SA? Not sure if that figure includes any leather items but for reference, I got my first kelly 28 after spending around 15k (including a bearn compact wallet and a calvi) in about 6 months. Definitely agree with
@tinkerbell68 that everyone's experience is different and there are so many variables.
I have noticed the resell prices for birkins and kellys have gone down so it might be an option to consider. I recently saw a pristine grey kelly 28 for around 16k which really had me debating!
Whatever you decide, good luck!