You'll probably be okay without a permit if you install everything to code. I might consult with and maybe hire a plumber who should be able to wire the pump. Shaping the ground, digging the sump basin and installing moisture barrier is homeowner doable.

I noticed that Home Depot now sells a sump pump with a battery backup. This would have been very helpful to me during the 2013 flood when my crawl space and the house basement next door had virtual creeks running through them. We had power for two days but when that failed, I was SOL and had to drive to GJ to get my generator, more sump pumps and hoses. When I do a remodel next year I[m going to install a permanent sump with battery backup, and an automatic backup generator.

Oh, I'm curious what company you talked with and what their price was for the sq. footage?