Is there any problem setting Base price=1.0E-5 on the backend?

[CADO]

Hi guys

I am working on a new website and decided to use only Custom fields to give the price. Therefore my product details starts with Sale price=£0.00, then when customer chooses quantity by
clicking on the custom field drop-down menu, Sale price changes.

To make my Sale price starts from £0.00, I had to set Cost Price to £0.00001 and Sale price to 1.0E-5 (Please see picture attached).
Is there any problem working this way?

Regards

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