readandpostrosie wrote:
i want a whirlpool bath, but i don't want to empty it each time.
(holding tank) can i find a hot tub that would do the trick?
is that possible?

You do NOT want a hot tub if you actually want to bathe in it .

Taking a shower first and then soaking is fine, but too much debris
(soap, skin oils, etc) will really put a load on filters and sanitizing
chemicals.

Check your local codes. Your tub water may be considered gray water,
and disposal as surface water might be permitted.