Hi
I would never recommend that you mix brands, especially not with your liquid and powder system, this can lead to problems such as product breakdown ( your clients nails may experience problems such as breaking, lifting, cracking, chipping etc...)
Also there is a risk of 'overexposure' when mixing brands, which could lead to your client suffering adverse reactions...
And on top of these problems it could ruin your reputation as a technician.
Many clients are very quick to not allow technicians a second chance if a problem arises, So you could face losing clients too,...Who may then tell friends etc. etc.....
I DID mix brands once, One monomer with another polymer, only while practicing on tips, as I didn't want to 'waste my good stuff' ... what happend ! well it would NOT set, It just stayed rubbery on the tip, and would not harden up whatsoever.
Imagine the embarrassment if this happend while working on a client
If you are working out your prices correctly you really shouldn't find the price a problem.
Also you can make really large savings the larger you buy.
You could perhaps speak to your supplier and I am sure they will be able to help you with you price per service etc..
Emma x