becoming a single process blonde?

is anyone here a single process blonde? what is your experience and natural hair color?

i am thinking of switching from heavy blonde highlights to full color single process blonde.

i am a natural level 6 so even with highlights my roots are very visible in 3-4 weeks. i go longer between touch ups because highlights are so expensive!

single process costs 1/3 of the price of highlighting my whole head, so i will not mind going in every month to touch up my roots.

my hair dresser says she can get me to a warm golden blonde with single process.

thoughts/opinions?

i know the roots will get bad with single process but they are bad with highlights too so i figured this will be cheaper. also, i want to be a full all over blonde. the highlights make my hair very light but it isn't the same look as all over blonde which is really what i want.