Hi,
Think of it the other way, say you do 5 sets of nails in a day and you take £150.00, do you really think her salon is worth £75 for the day? It sounds very steep to me. I don't pay my landlord that much for my 3 bed house!!!
Also, she clearly wants you so you can enhance her business. Help her keep her customers happy etc.
Ask yourself if you want to be 'her nail person' or if you want to big up yourself and demand a higher status. Don't be sidelined, be the senior Nail Technician!
If you do go for the 50/50 route, here are some ideas to keep your end of the costs down.
Set a daily maximum (you won't ever pay her more than £xx for a single day). There is only so much heat, light, space etc etc that she can claim you use.
Set rules out against costs, we all give extra's and freebies and a little more time for our favourite and most valued customers make sure you account for these as a COST and make sure she shares that cost with you before you hand over her share.
Ensure you are in control of the bookings system for your customers, make sure you get proper breaks worked into your schedule.
Don't be drawn into doing the boss's nails for free - she has to pay for the products used even if she doesn't pay for your time.
Work out with her in advance if she is going to expect you to share costs such as advertising, a half page in the local paper can be a couple of £££ so make sure you know up front if she has some 'shared' spending with your money in mind?
Is she going to expect you to outlay for a nail station, outfit to match the salon etc? Make sure these costs come off the profits of her share before you start giving her money.
On the insurance side - is she going to share half of your risk? If something goes tits up will she pay up too?
She may be able to write off some of the space you use against tax, as its a space she personally isn't taking money for, I am not fully conversant with how this works, an accountant is who we need. You may find she can save some and then you could drop how much you pay?
These are just observations I have picked up locally, it seems a bit of a minefield and sadly I think some unscrupulous owners are taking advantage.
The simplest systems I have seen are:
The Nail Tech pays an hourly rate for the use of the table/station.
The Nail Tech pays a daily % of takings (product costs/insurance/overheads are with the salon)
I hope that helps,
Naomi