Basically, hunting mons cost nothing other than pokeballs (200 pokdol each)
Sync mons cost 5000 pokdol
Not all pokemon need membership/ black medalion
False swipe? You can use anything, scizor trash for swipe cost 5k ea (not lv 100 ofc).
Leveling? Theres vic road or seafoam or dragon dens, etc.
You just need to be patient. Thats all
Hunting 2 days, got usable mons to sell, sell for 200k, then you already have more than enough to continue your journey.