I have been getting blonde highlights on my light brown natural hair color for years. I do like the results when they are done well, but I don't like the cost of upkeep! I'm thinking of doing single process blonde hair next time but I've never done it before. I know the coloring is much cheaper, but how is the upkeep? Would I need to do single process every couple of months or roots only? Is the cost of doing roots less expensive?
Thanks for any advice!