1 day shower installs; If they can do it, can’t we?

[David S.]

Looking for tips and tricks on quick shower and tub installations. I see a ton of advertising on “One day shower installations” but noticed that most renos are still done with inserts or large format tile, not with the systems used for these “one day” installs.
The big box stores are lacking in a good selection of shower/bath panels. They want $1000 and have one or two options for anything similar to what these outfits are using. 
Surely there are some of you more experienced flippers/renovators who use a bit more affordable shower wall systems that are well built and look good/higher end? If so, where are you buying these? 

All in all I’m looking for any tips on quick shower/tub renovations, from studs up; Effectively cutting out existing tile and backer, then installing a panelized wall system from there. I can’t believe this isn’t more common.

Thanks