More a personal note. Regular website sizing (normal traffic, fronted with CloudFlare and Azure) compared with active use (voting/ballots and interaction).
The website is all WordPress on LAMP – so RAM and disk writes are key for the voting.
Normal use: B2ms – 2 vCPU, 8GB RAM
Surge use: E16s_v3 – 16 vCPU, 128GB RAM
Planning around this – and it’s a few extra dollars per month.