Looking for suggestions on finishing my first rack
Come on, that's far too small that rack consider at least 3 rows with this small 84 HP width. You, of all, should know, you are saving money for your third rack ;-)
Take the above suggested rack by Sacguy71 but create it with 3 rows (instead of the displayed 1 row). Fill up one or maximum two rows and keep at least one row completely empty for future extensions. Don't buy all modules in one go, buy a few, build up some experience with it, adjust (where needed) your opinion and buy a few modules again. Slowly build it up :-)
Kind regards, Garfield.