3k budget for Turntable and Phono Noob- do I need external power supplies?

You are putting the cart before the horse. First buy the best TT you can afford. Then listen for a while before you even think of  an aftermarket PS. 

"Is it worth adding a $500 Sbooster or IFI Elite to either the TT or phono or both?"

Too much audio forum/audio website reading and brainwashing.

Something like this. Look around and get without cartridge for $1500

Mobile Fidelity UltraDeck Manual belt-drive turntable with pre-mounted cartridge at Crutchfield

Schiit Audio: Audio Products Made in USA

Set it up, avoid audio forums and enjoy 

@lewm

+1

Absolutely. Best you can possibly afford before extra upgrading extras. Enjoy for many hours... the phono stage will need breaking in as well as the cartridge. 200 hours of vinyl play is listening to around 500 album sides. Rega or Project are great options. 

I like the Pro-Ject Extension 9 and the phono preamps. Pro-Ject makes good analog stuff. 

For that level of TT and cart, NO WAY!  As suggested, get the best you can afford now, buy a few hundred albums, listen, listen, listen, then forget the power supply and upgrade your TT a few times before you ever think PS again.  (Unless of course it is to upgrade a wall-wart PS to a real PS, which is generally well worth it!).