no beach sand!
clean out everything
sumps are by far your best option but arent mandatory, a sump in a saltwater tank makes your life extremely easier
aragonite sand: 60 lbs - $40
40 lbs lace rock: $60
5-10 lbs live rock: $15-30
200 gal. salt: $50
Skimmer: $60+
20% wc every other week, feed ~10 times a week depending on species
no volitans lions for your tank, get a radiata, dwarf, fuzzy, antennata, etc.
then with it you can have a snowflake moray, a blue-dot toby puffer, and scopas tang as tankmates + hermit crabs, nass. snails, nerite snails, astraea snails, etc