The wash you suggest may or may not be good depending on operator technique and water supply. That is why I have given the original suggestion by Kodak and others here of a use of continuous water washing. If you use your method, it is virtually mandatory that the person test for residual silver salts and hypo if they wish to get maximum permanence.
I have given the data from Mason earlier in this thread. I also suggest that you consider that most people refer to two levels of wash, normal and archival. You should give some information on the differences if you are to "approve" a given method.
I have found, over the years, that the so called Ilford method is much more intolerant of error. Sorry. I still have to disagree with you.