"I also have a LiFePO4 lithium house bank on a cruising boat. I tried two parallel batteries using 8 272ahr DIY cells configuration early on. It is a nightmare to wire all the relays and other things you will need to properly protect and monitor even my two sets of 4 cells, 540ahrs. And then there is the significant additional expense for multiple BMSs and other components. Dacian can explain this to you in much more detail if needed. We are now configured 4 sets of 2 parallel cells in series or 4S2P. Only one BMS and much easier system wiring. For monitoring 32 individual cells, there are many small inexpensive monitors available that can let you see each cell if you want that level of detail. Some can be displayed on a computer/cell phone/etc via blue tooth/wifi. We are using a very detailed display with Node Red to our remote computer via wifi to monitor our daily cell status. If anything happens to even one cell we will be able to see it immediately. There is more on this on Oberon's Beginners' Guide and elsewhere. We think the Electrodacus system is the the best reasonably priced way to safely handle a lithium system on a boat."
Others with other BMSs have done this. See some of the other forums and Utubes. It is not impossible, but very difficult if you want to get it right. And there are some tradeoffs which Dacian can better explain to you. For us, the installation difficulties out weighed the advantages. If we have a problem with a cell it will most likely develop slowly, and we can address that when needed. We have already had a problem with one cell self discharging excessively, so we replaced it after a month watching it. Hopefully if it is a wiring or other component problem you will see that you have a problem by monitoring your wifi display.
Purchasing one or two spare cells might be a good preventative measure if you are buying low end Chinese cells. Dave