I went to plenty of burners early on. This old guy has a single tier system and for ten gallons my pumps are back savers.
If the OP is doing 5 gallons get the best best burner you can afford. Heat is required to make beer, be it NG, LPG, electricity, steam, or fire wood.
If you go to 10 gallons the pump will recirculate when chilling, move and lift the wort, and for low gravity ales I use it to aerate by pumping full throttle into the fermenter. Pumps are a tool I find useful.