Got it. I'm looking for something simpler, so what are my option for a midrange drivetrain that would fit without mods? And how can I find the right wheel, i.e. what specs do I need it to meet, if I'm buying off ebay, etc. Thanks for your help

Edit would the following work:

HG50 or SRAM PG 950
+
Wheel with 135mm spacing and FH-RM30-8 hub.