You can likely get LED's from Lowes for cheaper tbh. If I'm getting everything new, it's more of a convenience to get everything from the place that I'm getting the cage, with the exception of like flexwatt because I can get it a lot cheaper from reptilebasics. Now any additional modifications I'd do myself you may as well get from the hardware store yourself.
I also have a T8 & 2 T3's. All sliding glass except for one T3 that has swinging doors as those are easier to deal with the snakes that are housed in there.