I'd want a radio with everything that I'll be licensed for. No need to upgrade a day later because I skimped and bought a limited radio.
That can get expensive.
First, you will not find a radio that covers -everything- you would be licensed for. You can get radios that will cover the HF bands as well as 6 meters, 2 meters and 70 centimeters.
But you are looking at $1000+, then you need to add the antennas necessary to cover all that spectrum, coaxial cable, power supply, etc.
You'd be looking at $1500 at the low point, maybe a bit less if you went with used equipment, but amateur radio operators are notorious for selling even well used radios for high prices.
"Wanting it all" isn't always the best choice for someone new to the hobby, there's just too many aspects to get it all in one radio. It gets expensive really quickly, and you'll still be looking for more.
I'd recommend starting with something reasonable. Figure out where your interests are, get some experience, then start looking once you've got some time and experience under your belt. Make sure you understand the antenna requirements, etc, as that can impact how well it all works. No point in investing in a lot of HF gear if you live in an apartment/condo/or HOA controlled area.
If you have unlimited funds, then sure thing, drop $1500 or more on a radio, but you may be disappointed if you don't end up using all it's capabilities.
As others have said, starting off with a dual band mobile, a 12 volt power supply, some decent coaxial cable and a good base station antenna would be a good idea. That'll let you talk to some locals, get into a few IRLP nodes, and get some experience.
Amateur radio can be a life long hobby, so don't rush into purchases. Your interests will change, and you'll go through a lot of radios.