Liner pools generally have 42" walls in the kit. The walls are either steel or resin. Trying to get custom heights will add

Liners will also cost somewhat more as the liner manufacturers also use 42 wall patterns that would need cutting down more than normal.

All in ground liners are custom made. Most above grounds are not custom.

The same amount of equipment and man/hours (well close anyway) may make this more also.

Basically, what I am saying is that since you mentioned budget, shallower isn't cheaper.Many PBs have minimum prices also.

Scott

You might want to just build a 42" deep pool with some buddy seats. Throw some floats in and a very usable pool is there for you.

Scott