Pits are great. They still use em in big truck shops. If outlawed in your area it is because of the mess caused if gasoline gets in them....don't make a spark. Probably the most common problem is falls. I've fallen in a pit 3 times. I still like them. The planks that cover it when not in use...
Ever consider a pit. Insurance companys frown on them. They are as safe as the user. A good plank cover for when not in use is mandatory. Design it into your new home. If the pit bottom is properly finished, you can pick up spills, clean, with a snow shovel. If you want to pull a heavy pickup...
You might want to go to a concrete slab under it. I'm assuming it's on a wood floor. Nothing like dead weight under the mounts to isolate sound/vibration. I worked under a 7.5 DeVilbiss, mounted on a plywood floor. Sounded like someone going at it with a air hammer on a base drum. Sheer torture.