Bob, my dad has very rocky soil at his place and front tines tillers jump all over, compared to the rear tines. They jump too, but not as badly. He got a Bolens (MTD) front tine a few years ago brand new. It jumped horribly. He gave it to me, I used it on my no rocks backyard suburban garden. It jumped and was bad here too. He gave it to the neighbor as payment for something and the neighbor promptly craigslisted it.
If you get an older used front tine, you should be fine for cultivating. For that role, in my small garden, I use a front tine micro tiller. It works like a charm for that role. I can maneuver the micro very carefully and it really gets good results for me. It is narrower though.
I have a rear tine tiller I got off Craigslist that works great for breaking the ground and love it.
Good luck. I think you should do well, depending on your soil conditions.