The second one: true love Spa health sports center ... this is mainly for members! It's not that membership items are expensive!
Third: Victoria Bath Entertainment Company ... This can be recommended. It's not bad in Xi 'an, although it's a little old.
Fourth: Caesar Palace Bathing Plaza ... Same as above, a little old.
Fifth; Qing Yu Jian suo ... this is not bad, but it feels a little small.
Sixth: Kaidehua Bath ... Don't go there, the facilities are too old. It's right across from Victoria.
Xi' an's rubbing bath is generally around 35, remember that salt bath is not necessary, it's a lie!
According to your request, I recommend the Furong Palace, which is next to the South Square of the Big Wild Goose Pagoda. Personally, I feel that the package is more cost-effective, and all the items you mentioned are basically available.