Hi, and welcome to the forum.

The fact of the matter is that you also have to be careful about doing "the six month splits" between the US and anywhere else. I know of a couple who had problems with a multiple entry visa because two six month visits within 18 months was considered "excessive." (This was for an American married to a Brit - and only the husband was refused entry.) Unfortunately, it comes down to the particular agent you are dealing with each time you enter the US.

On the other hand, lots of folks do this successfully - especially in Florida. The trick seems to be to maintain your "strong ties" to your home country - property, any business interests, anything that shows that you have no reason to stay in the US year-round.

You mention your "partner" - you are aware, I'm sure, that you'll have to qualify separately for visas unless you are married (and the US doesn't recognize same-sex marriages). That includes being able to "prove" that you aren't going to overstay your visa. They won't just assume that because one of you has sufficient business interests back home that the other will go back, too.
Cheers,
Bev