Looking for fat-friendly tool to check if floor is flat

Hello,

I am a fat man with a problem. I am likely going to be searching for a new apartment in the coming months. My current apartment has a very crooked floor, which is somewhat irritating if you use chairs with wheels as they tend to roll towards a specific spot. Although I realize that most apartments have somewhat crooked floors, I would like to find an apartment with a less crooked floor. I am looking for an instrument to do this.

I realize I can use a leveler, but new problem is you have to hunch over to Arab the results and pick it up. Like a number of fat people I find squatting and hunching over quickly exhaust me. Thus I believe that the best thing to use would be a bouncy ball on a string. I realize a yoyo wou ld also work but it only usually rolls along one dimension.

I could've sworn I saw just plain bouncy balls with strings coming out of them when I was growing up but I am having trouble finding one online. Can anyone either suggest another tool or point me in the direction of where I can find such a ball online or in a store? I would appreciate any help that anyone can provide.

Thanks.