Hi. They do sell high power single power supplies. You'll need to tie all the grounds together if you use different power supplies. Also, if you use one power supply, you will have to "inject" power along the strip. My suggestion is to insert power every 5m.
If you are going to use one large power supply, you should fuse the branches. Low voltage can have a higher fire risk than house wiring.
Another thing to consider is that 25 meters is a long run and depending on how you plan to have everything wired up, apa102s or ws2811s might be more reliable because they have a dedicated clock line an arnt so dependent on tight timing, like ws2812/13.
If you are going to be running jumpers in between the strips i would use twisted pairs with a ground in each of the pairs (one for clock, one for data).
I am using 45 meters of 12v 2811 strip for my project. (eve lighting) I am running it in a meanwell 100amp power supply. I fused the power supply at 60 amps, then each branch is fused at 5 amps.