What you plan to build sounds almost identical to my 8t-4(e) including the protek servo, except the 2250kv tekin in mine. I do have a 2000kv still in the box, and a matching truggy to put it in, honestly mine has been fine for the occasional bashing but swapping parts to race could get annoying. So backup truck will be the race rig, and building 2 matching Truggy's simplifies the parts box and tools.

And if you shop here you can find everything you need and save enough to afford both rigs.