M.F.
Hi
I have used the individual 12X12 self stick tiles and they don't hold up in high traffic areas. Especially in areas where you need to mop frequently or where water will be spilled or where you have high humidity ect.
The corners pull up and if you have kids or dogs they will find that corner and pull up half the tile! Or they "slip" or get scuffed from chair legs.
I have to replace 2 large room of these tiles and its been less that 5 years since I did them. (and quite a bit of money) I preped the rooms as directed an the box but the warrany doesn't cover wear, scuffs or damage.
I would suggest you go for high quality sheet linoleum or go with ceramic tiles. both projects seem fairly simple in theory and I'm going to attempt ceramic tiles myself this spring. Good luck!