I had this kit, and several of it's cousins, many years ago. They all work similarly. It's a foot-long plastic model with a battery compartment underneath for 3 "C" cell batteries. The motor is turned on and off via a switch. The rudder is set manually before release, and the stern dive planes are hooked to a linkage that is operated by a radar mast or pendulum. As the model submerges, the pitch or water flow moves the planes to "surface" attitude, thus making the model porpoise across the swimming pool.
Bottom line, a (very) slightly realistic pool toy. Remote control: none.
I'm not saying you couldn't re-engineer it to be R/C or tethered, but unless you HAVE to have that particular boat, it's probably not worth the effort.
Like Jeff said, define "affordable"