You can't cast this spell with a Component Pouch anymore lol

Is it 5gp per cast or does the symbol remain after casting?

if it doesn't say its consumed, you don't destroy it from the cast. Keep your 5gp+ Holy Symbol :)

If your DM remembers that the spell uses a holy symbol, this mostly just means magic initiate people need to go out of their way to find one if they want to cast the spell. Granted its 5 gp, so probably affordable and this spell honestly might be worth 5 gp in the long run, but it is important to note for like a first mission. 

Quote from Basil_V >>

If your DM remembers that the spell uses a holy symbol, this mostly just means magic initiate people need to go out of their way to find one if they want to cast the spell. Granted its 5 gp, so probably affordable and this spell honestly might be worth 5 gp in the long run, but it is important to note for like a first mission. 

I think this is a big part of why the new Acolyte background (which includes Magic Initiate) has a Holy Symbol as part of its starting gear.

I usually bless myself and two martial classes with this.  Martial classes benefit from this more since they make attack rolls more often, and frontline warriors are often subject to effects that require saving throws.  But I have the saving throw bonus on myself to help me maintain concentration on this powerful buff.