Welcome to TPT.
Low iron rimless tanks in the 90P class (~ 36x18x18) are ~ $500 new.
For such tank you will need x2 Current/Fluval/AI Prime lights: ~$400+
A decent co2 setup ~$250+
A 200-300w heater $30-70
Heater controller $30
Cannister filter ~350 gph ~$175
Substrate $20 - $150
Stand? Petco's metal stands suck (I have 2 and they wobble)