I want to swap my 98 Honda dx engine with a k24a, after getting only the engine for about 700$ what other costs should I expect while swapping.

 

PCM, wireharness, adapter harness, clutch, flywheel, transmission, fuel fittings, axles, probably hubs/knuckles on a dx, brakes to match, engine mounts, shifter box, shift cables, exhaust manifold, probably full exhaust, intake and air filter.

A bare K24 is like 5% of the swap. Get ready to part with a bunch more hundred dollar bills.