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一方的にリゾートホテル予約して遊ぶお金10万渡したら…
→ “If you just unilaterally book a resort hotel and hand over 100,000 yen for him to play with...”
一方的に ippō¹teki ni = unilaterally (adverb)
一方 ippō¹ = one side / one party
的 teki = -like / -ish (suffix)
に ni = to / by (particle indicating manner)
リゾート rizō¹to = resort (loanword)
ホテル hoteru = hotel (loanword)
予約 yoyaku = reservation (noun)
して shite = doing / having done (conjunction form of suru)
遊ぶ asobu = to play / to hang out (v.)
お金 okane = money (n.)
10万 jū¹man = 100,000 (number)
渡したら watoshitara = if I give / if handed over (conditional form of watasu)