Old waterbeds should already be phased out of your homes. This isn’t the 70’s. And you can do away with a heavy waterbed.
Consider a waterbed air mattress, such us this one from Waterbeds as a more practical solution. Waterbed air mattresses are lighter than the traditional one. So, transporting this or placing it on an upper level room should be easy.
Traditional waterbeds also have unstable motion when you shift your sleeping position. This almost never happens with a waterbed air mattress.
No wooden frame needed, but can be used
Attached safety liner
1/3 Less water for 1/3 less weight
Firm supporting edge
Adjust both water and/or air for personal comfort
Heavy 27 mil vinyl
3 Year warranty