All you said is true but the op isn't building a race engine, just perking up a 318 on a budget. Hydraulics aren't that bad. Billions of engines have been built with them.
tool, please note that forum member that I replied to was Ottmundr, never stated what the build is, only that he is looking at 3 different hyd roller cams.
The original thread was posted by dartfreak75 the man with the budget 318 which if he has them hyd lifters would very fine.
Please pay more attention in the future before you start pointing fingers.