Get an epilator that runs on power or battery from Amazon maybe? Something kike this? There are cheaper ones but I would go with a good brand you know and trust due to the initial expense. =)
https://www.amazon.com/Braun-Silk-%C3%A9pil-Epilator-Electric-Packaging/dp/B00TI5ZN14
Throwing in my vote for the Braun Silk Epil 9. Its a bit pricey but worth every penny. Had it over a year and it's seen a LOT of use. It's also waterproof and I have found it a little less painful using it while in the shower.
It doesn't leave any shadowing and gets easier with each use because only a few hairs in the growth phase (anagen) pop up at a time and they are much finer at first. I have very dark hair in my underarms that leaves a shadow, but epilation solved that for me. I'd let it grow past stubble a little, so the tweezers have something to grab on to, but it doesn't need much length at all.
I use this one.