hi, running cost for storage heater is a bit high. and for it to heat up, it will take a while, unless u print money and nvr switch it off, then the water will be instant hot. Otherwise when u off it, it will slowly lose its heat, so when u need to use, u got to reheat the water (similar concept as those electric flask).
instant heater also ok, but like u mention, no hot water outlet at sinks, kitchen, etc.. so i using gas heater (free from citygas, my current house last time i got to buy that heater). it is ard the size of instant heater, just that need to put in the kitchen (or service balcony). not big, and honestly, i hv had this heater for 7 yrs, i hardly clean it but it is not as dusty as the things i put on display in the living room.. haha... with this heater, running cost is lower, and i hv hot water in all shower, sinks (include kitchen).
as for ceiling fan, actually using ceiling fan the air ciculation is better. those standing fan yes, you can put it nearer to u, but it will only cool a certain area only. but ceiling fan, the whole area the air is circulated, so if there are a lot of people, it is more comfortable. otherwise, if a lot of visitors, then hv to put multiple standing fans.
i thk if u hv false ceiling then ur ceiling is lower, so the blade to the ceiling has lesser clearance so no air i thk. but lbox is ok bcos the fan is still mounted on the ceiling. put in bedroom i thk ok but i thk cannot put those with hanging lights. I try la see how.
Yes cleaning the fan is the only trouble that i can forsee. but my current house there are 2 fans, i clean them once a yr and its actually not so dirty like those at coffee shop/classrooms.. haha.. but it helps a lot if u are tall or u hv a step ladder (i hv so no prob to clean la)... haha
i use standing fan in my bedroom now, when i sleep with my kids, very difficult for the wind to teok all of us.. haha..