Uh yah that'll work...I get them like that sometimes. I usually tell them they should really do it right and the cost isn't usually that much more.
But if they are insistant I make sure they understand what they are getting for what they are paying (then I do a little more because I hate half done work). I will wash to a good divider like a seam and leave it at that, that is the best way to 'blend'.
I haven't had a job like that in a few years where they wanted to cut back like that, usually they buckle and do it right.