I've seen very pretty sg gals who were approached by upper class men in local clubs (read local not thai or prc nightclubs) for a lower fee than that.
Not that I've seen or known any of them accepting it but for 5k, she'd better be prettier, or a virgin, or something special.
All things aside, bros think about what you can do with 5k before you commit.
- Chanel bag 3k still got spare change to go paktor
- Dinner and drinks at fancy restaurant + cartier or bvlgari, prob around that price too
- Spending money in a club say butter/zouk/filter, set your self back for $1500/night, you get a good amount of champagne and hard liquor (5 bottles champagne 2 bottles vodka maybe?) - invite a few friends and their girl friends, do it for a few nights, expand your network, eventually you will get a few fucks or even a fb or gf.
I think all the above mention will prequalify anyone to be a sugar daddy or eventually get the attention of the gal u like.
But paying 5k a mth bluntly is not my cup of tea really.
Maybe sometimes, imitation IS the best form of flattery