Depends on your skills, stuff that you're passionate about. You can always scale up/ down.

From reselling garments, home appliances, car accessories, mom and baby needs, skincare

you can explore having a curated inventory, niche food, spices and condiments.

You can start a scaled down brewery for beer or coffee, karinderya or resto type, burger stall,

Bigger ventures (might not roi under 6 mos):

You can franchise a laundryshop, water refilling station, pet service, cleaning service.

Co own a testing facility, a pharmacy, delivery program

Start a small design firm/ ad agency, music studio.

I can probably detail a cost breakdown to force fit these under 100k pero lobat na utak ko hehe