3 day build-time for a new warframe

I started playing Warframe about 4 days ago and got Rhino. I’m already close to completing the whole star chart, but I still don’t have my 3rd Warframe. It sucks because I want to try other Warframes, but the game feels like it’s forcing me to wait. The 3-day crafting time for a frame is ridiculous when the star chart can be cleared in less time. I want to fight new bosses with new frames, not just run the same missions over and over with the same old Rhino. It really kills the excitement when you’re ready to experiment but have to sit around waiting for a build timer to finish. The pacing just feels way off because I’m unlocking content faster than I can actually get the gear to enjoy it.