Is the MoFI UltraDeck wit the MasterTracker cart the best TT solution @ $2,499?

Of course it is not the "best solution" at $2500 

This is the price for a used coreless direct drive Technics 1200G released not so long ago, the GR version is even cheaper.

You can even spend your $2500 much better if you don't mind to buy some vintage tip top stuff like Denon DP-80, Technics SP-10mkII, Luxman PD-444 with tonearm of your choice and some decent vintage MM cartridge for example. Personally i am much more happy with vintage DD turntables, some of them are here. Luxman PD-444 is definitely my favorite of them all, i like it so much that i even bought two. 

I don't know if it's the "best" for that amount, but I have heard one and it sounded great and seemed to be really well made.

I have it, and can't say if it the best at that price, but it make me smile every time I place a record on the platter and make music with it.  Zero regrets.  Zero.  

The SOTA COMET V !
https://sotaturntables.com/products/comet-v/

actually for that money get a refurbished SOTA Sapphire, decent Jelco arm and an Ortofon Black and whale on the Ultradeck....just my buck fifty.....but yes, I have heard the Ultradeck many many hours with a Bronze, and yes it is good....