If you do your FAA Instrumnet training under Part 141 you are somewhat stuck to a syllabus but there is no requirement for the 50 hrs XC.
I vaguely recall we discussed this earlier already.
The 50 NM crosscountry requirement only applies for training conducted under part 61.
But you've come up with a good solution; I would highly encourage to do as many cross countries under IFR as you can.