The best thing to do is to find some tanks that has been in a closet for a while.. Used tanks out of hydro and vip can be had for free or $20 all day long.. Half the time its free from someone I know that know someone..There are plenty to go around..
I rec’d 3 steel 60 cu. tanks filled !.. For free and the last hydro was the early 70’s.. All came back from hydro, vip and ready to go..
I like the 10 year old 2 Steel H.P. 120’s that I got both for $100 ea.. Same size as an Alum. 80.. but 120 cu... Both passed Hydro. and Vip.. And Nitrox certified...
I bought 4 new alum 80’s 17 years ago.. Only one had a crack in the neck last year... And that was probly from the boat bouncing around in Lake Mich for all that time... 3 tanks are still hydro’d and vip’d.. 80’s are the safest to use for recreational diving..